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Fix misspellings of "system", "controller", "interrupt" and "necessary".
[linux-2.6/mini2440.git] / fs / cifs / connect.c
blob19ee11f7f35ad6188207d25edccb0af3b8cdad11
1 /*
2 * fs/cifs/connect.c
3 *
4 * Copyright (C) International Business Machines Corp., 2002,2007
5 * Author(s): Steve French (sfrench@us.ibm.com)
6 *
7 * This library is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU Lesser General Public License as published
9 * by the Free Software Foundation; either version 2.1 of the License, or
10 * (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
15 * the GNU Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public License
18 * along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21 #include <linux/fs.h>
22 #include <linux/net.h>
23 #include <linux/string.h>
24 #include <linux/list.h>
25 #include <linux/wait.h>
26 #include <linux/ipv6.h>
27 #include <linux/pagemap.h>
28 #include <linux/ctype.h>
29 #include <linux/utsname.h>
30 #include <linux/mempool.h>
31 #include <linux/delay.h>
32 #include <linux/completion.h>
33 #include <linux/kthread.h>
34 #include <linux/pagevec.h>
35 #include <linux/freezer.h>
36 #include <asm/uaccess.h>
37 #include <asm/processor.h>
38 #include "cifspdu.h"
39 #include "cifsglob.h"
40 #include "cifsproto.h"
41 #include "cifs_unicode.h"
42 #include "cifs_debug.h"
43 #include "cifs_fs_sb.h"
44 #include "ntlmssp.h"
45 #include "nterr.h"
46 #include "rfc1002pdu.h"
47 #include "cn_cifs.h"
48
49 #define CIFS_PORT 445
50 #define RFC1001_PORT 139
51
52 static DECLARE_COMPLETION(cifsd_complete);
53
54 extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
55 unsigned char *p24);
56
57 extern mempool_t *cifs_req_poolp;
58
59 struct smb_vol {
60 char *username;
61 char *password;
62 char *domainname;
63 char *UNC;
64 char *UNCip;
65 char *in6_addr; /* ipv6 address as human readable form of in6_addr */
66 char *iocharset; /* local code page for mapping to and from Unicode */
67 char source_rfc1001_name[16]; /* netbios name of client */
68 char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
69 uid_t linux_uid;
70 gid_t linux_gid;
71 mode_t file_mode;
72 mode_t dir_mode;
73 unsigned secFlg;
74 unsigned rw:1;
75 unsigned retry:1;
76 unsigned intr:1;
77 unsigned setuids:1;
78 unsigned override_uid:1;
79 unsigned override_gid:1;
80 unsigned noperm:1;
81 unsigned no_psx_acl:1; /* set if posix acl support should be disabled */
82 unsigned cifs_acl:1;
83 unsigned no_xattr:1; /* set if xattr (EA) support should be disabled*/
84 unsigned server_ino:1; /* use inode numbers from server ie UniqueId */
85 unsigned direct_io:1;
86 unsigned remap:1; /* set to remap seven reserved chars in filenames */
87 unsigned posix_paths:1; /* unset to not ask for posix pathnames. */
88 unsigned no_linux_ext:1;
89 unsigned sfu_emul:1;
90 unsigned nullauth:1; /* attempt to authenticate with null user */
91 unsigned nocase; /* request case insensitive filenames */
92 unsigned nobrl; /* disable sending byte range locks to srv */
93 unsigned int rsize;
94 unsigned int wsize;
95 unsigned int sockopt;
96 unsigned short int port;
97 char *prepath;
98 };
99
100 static int ipv4_connect(struct sockaddr_in *psin_server,
101 struct socket **csocket,
102 char *netb_name,
103 char *server_netb_name);
104 static int ipv6_connect(struct sockaddr_in6 *psin_server,
105 struct socket **csocket);
106
107
108 /*
109 * cifs tcp session reconnection
110 *
111 * mark tcp session as reconnecting so temporarily locked
112 * mark all smb sessions as reconnecting for tcp session
113 * reconnect tcp session
114 * wake up waiters on reconnection? - (not needed currently)
115 */
116
117 static int
118 cifs_reconnect(struct TCP_Server_Info *server)
119 {
120 int rc = 0;
121 struct list_head *tmp;
122 struct cifsSesInfo *ses;
123 struct cifsTconInfo *tcon;
124 struct mid_q_entry *mid_entry;
125
126 spin_lock(&GlobalMid_Lock);
127 if (kthread_should_stop()) {
128 /* the demux thread will exit normally
129 next time through the loop */
130 spin_unlock(&GlobalMid_Lock);
131 return rc;
132 } else
133 server->tcpStatus = CifsNeedReconnect;
134 spin_unlock(&GlobalMid_Lock);
135 server->maxBuf = 0;
136
137 cFYI(1, ("Reconnecting tcp session"));
138
139 /* before reconnecting the tcp session, mark the smb session (uid)
140 and the tid bad so they are not used until reconnected */
141 read_lock(&GlobalSMBSeslock);
142 list_for_each(tmp, &GlobalSMBSessionList) {
143 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
144 if (ses->server) {
145 if (ses->server == server) {
146 ses->status = CifsNeedReconnect;
147 ses->ipc_tid = 0;
148 }
149 }
150 /* else tcp and smb sessions need reconnection */
151 }
152 list_for_each(tmp, &GlobalTreeConnectionList) {
153 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
154 if ((tcon) && (tcon->ses) && (tcon->ses->server == server))
155 tcon->tidStatus = CifsNeedReconnect;
156 }
157 read_unlock(&GlobalSMBSeslock);
158 /* do not want to be sending data on a socket we are freeing */
159 down(&server->tcpSem);
160 if (server->ssocket) {
161 cFYI(1, ("State: 0x%x Flags: 0x%lx", server->ssocket->state,
162 server->ssocket->flags));
163 server->ssocket->ops->shutdown(server->ssocket, SEND_SHUTDOWN);
164 cFYI(1, ("Post shutdown state: 0x%x Flags: 0x%lx",
165 server->ssocket->state,
166 server->ssocket->flags));
167 sock_release(server->ssocket);
168 server->ssocket = NULL;
169 }
170
171 spin_lock(&GlobalMid_Lock);
172 list_for_each(tmp, &server->pending_mid_q) {
173 mid_entry = list_entry(tmp, struct
174 mid_q_entry,
175 qhead);
176 if (mid_entry) {
177 if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
178 /* Mark other intransit requests as needing
179 retry so we do not immediately mark the
180 session bad again (ie after we reconnect
181 below) as they timeout too */
182 mid_entry->midState = MID_RETRY_NEEDED;
183 }
184 }
185 }
186 spin_unlock(&GlobalMid_Lock);
187 up(&server->tcpSem);
188
189 while ((!kthread_should_stop()) && (server->tcpStatus != CifsGood)) {
190 try_to_freeze();
191 if (server->protocolType == IPV6) {
192 rc = ipv6_connect(&server->addr.sockAddr6,
193 &server->ssocket);
194 } else {
195 rc = ipv4_connect(&server->addr.sockAddr,
196 &server->ssocket,
197 server->workstation_RFC1001_name,
198 server->server_RFC1001_name);
199 }
200 if (rc) {
201 cFYI(1, ("reconnect error %d", rc));
202 msleep(3000);
203 } else {
204 atomic_inc(&tcpSesReconnectCount);
205 spin_lock(&GlobalMid_Lock);
206 if (!kthread_should_stop())
207 server->tcpStatus = CifsGood;
208 server->sequence_number = 0;
209 spin_unlock(&GlobalMid_Lock);
210 /* atomic_set(&server->inFlight,0);*/
211 wake_up(&server->response_q);
212 }
213 }
214 return rc;
215 }
216
217 /*
218 return codes:
219 0 not a transact2, or all data present
220 >0 transact2 with that much data missing
221 -EINVAL = invalid transact2
222
223 */
224 static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize)
225 {
226 struct smb_t2_rsp *pSMBt;
227 int total_data_size;
228 int data_in_this_rsp;
229 int remaining;
230
231 if (pSMB->Command != SMB_COM_TRANSACTION2)
232 return 0;
233
234 /* check for plausible wct, bcc and t2 data and parm sizes */
235 /* check for parm and data offset going beyond end of smb */
236 if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
237 cFYI(1, ("invalid transact2 word count"));
238 return -EINVAL;
239 }
240
241 pSMBt = (struct smb_t2_rsp *)pSMB;
242
243 total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
244 data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
245
246 remaining = total_data_size - data_in_this_rsp;
247
248 if (remaining == 0)
249 return 0;
250 else if (remaining < 0) {
251 cFYI(1, ("total data %d smaller than data in frame %d",
252 total_data_size, data_in_this_rsp));
253 return -EINVAL;
254 } else {
255 cFYI(1, ("missing %d bytes from transact2, check next response",
256 remaining));
257 if (total_data_size > maxBufSize) {
258 cERROR(1, ("TotalDataSize %d is over maximum buffer %d",
259 total_data_size, maxBufSize));
260 return -EINVAL;
261 }
262 return remaining;
263 }
264 }
265
266 static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB)
267 {
268 struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
269 struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)pTargetSMB;
270 int total_data_size;
271 int total_in_buf;
272 int remaining;
273 int total_in_buf2;
274 char *data_area_of_target;
275 char *data_area_of_buf2;
276 __u16 byte_count;
277
278 total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
279
280 if (total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
281 cFYI(1, ("total data size of primary and secondary t2 differ"));
282 }
283
284 total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
285
286 remaining = total_data_size - total_in_buf;
287
288 if (remaining < 0)
289 return -EINVAL;
290
291 if (remaining == 0) /* nothing to do, ignore */
292 return 0;
293
294 total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
295 if (remaining < total_in_buf2) {
296 cFYI(1, ("transact2 2nd response contains too much data"));
297 }
298
299 /* find end of first SMB data area */
300 data_area_of_target = (char *)&pSMBt->hdr.Protocol +
301 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
302 /* validate target area */
303
304 data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
305 le16_to_cpu(pSMB2->t2_rsp.DataOffset);
306
307 data_area_of_target += total_in_buf;
308
309 /* copy second buffer into end of first buffer */
310 memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2);
311 total_in_buf += total_in_buf2;
312 pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
313 byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
314 byte_count += total_in_buf2;
315 BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
316
317 byte_count = pTargetSMB->smb_buf_length;
318 byte_count += total_in_buf2;
319
320 /* BB also add check that we are not beyond maximum buffer size */
321
322 pTargetSMB->smb_buf_length = byte_count;
323
324 if (remaining == total_in_buf2) {
325 cFYI(1, ("found the last secondary response"));
326 return 0; /* we are done */
327 } else /* more responses to go */
328 return 1;
329
330 }
331
332 static int
333 cifs_demultiplex_thread(struct TCP_Server_Info *server)
334 {
335 int length;
336 unsigned int pdu_length, total_read;
337 struct smb_hdr *smb_buffer = NULL;
338 struct smb_hdr *bigbuf = NULL;
339 struct smb_hdr *smallbuf = NULL;
340 struct msghdr smb_msg;
341 struct kvec iov;
342 struct socket *csocket = server->ssocket;
343 struct list_head *tmp;
344 struct cifsSesInfo *ses;
345 struct task_struct *task_to_wake = NULL;
346 struct mid_q_entry *mid_entry;
347 char temp;
348 int isLargeBuf = FALSE;
349 int isMultiRsp;
350 int reconnect;
351
352 current->flags |= PF_MEMALLOC;
353 server->tsk = current; /* save process info to wake at shutdown */
354 cFYI(1, ("Demultiplex PID: %d", task_pid_nr(current)));
355 write_lock(&GlobalSMBSeslock);
356 atomic_inc(&tcpSesAllocCount);
357 length = tcpSesAllocCount.counter;
358 write_unlock(&GlobalSMBSeslock);
359 complete(&cifsd_complete);
360 if (length > 1)
361 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
362 GFP_KERNEL);
363
364 set_freezable();
365 while (!kthread_should_stop()) {
366 if (try_to_freeze())
367 continue;
368 if (bigbuf == NULL) {
369 bigbuf = cifs_buf_get();
370 if (!bigbuf) {
371 cERROR(1, ("No memory for large SMB response"));
372 msleep(3000);
373 /* retry will check if exiting */
374 continue;
375 }
376 } else if (isLargeBuf) {
377 /* we are reusing a dirty large buf, clear its start */
378 memset(bigbuf, 0, sizeof(struct smb_hdr));
379 }
380
381 if (smallbuf == NULL) {
382 smallbuf = cifs_small_buf_get();
383 if (!smallbuf) {
384 cERROR(1, ("No memory for SMB response"));
385 msleep(1000);
386 /* retry will check if exiting */
387 continue;
388 }
389 /* beginning of smb buffer is cleared in our buf_get */
390 } else /* if existing small buf clear beginning */
391 memset(smallbuf, 0, sizeof(struct smb_hdr));
392
393 isLargeBuf = FALSE;
394 isMultiRsp = FALSE;
395 smb_buffer = smallbuf;
396 iov.iov_base = smb_buffer;
397 iov.iov_len = 4;
398 smb_msg.msg_control = NULL;
399 smb_msg.msg_controllen = 0;
400 pdu_length = 4; /* enough to get RFC1001 header */
401 incomplete_rcv:
402 length =
403 kernel_recvmsg(csocket, &smb_msg,
404 &iov, 1, pdu_length, 0 /* BB other flags? */);
405
406 if (kthread_should_stop()) {
407 break;
408 } else if (server->tcpStatus == CifsNeedReconnect) {
409 cFYI(1, ("Reconnect after server stopped responding"));
410 cifs_reconnect(server);
411 cFYI(1, ("call to reconnect done"));
412 csocket = server->ssocket;
413 continue;
414 } else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
415 msleep(1); /* minimum sleep to prevent looping
416 allowing socket to clear and app threads to set
417 tcpStatus CifsNeedReconnect if server hung */
418 if (pdu_length < 4)
419 goto incomplete_rcv;
420 else
421 continue;
422 } else if (length <= 0) {
423 if (server->tcpStatus == CifsNew) {
424 cFYI(1, ("tcp session abend after SMBnegprot"));
425 /* some servers kill the TCP session rather than
426 returning an SMB negprot error, in which
427 case reconnecting here is not going to help,
428 and so simply return error to mount */
429 break;
430 }
431 if (!try_to_freeze() && (length == -EINTR)) {
432 cFYI(1, ("cifsd thread killed"));
433 break;
434 }
435 cFYI(1, ("Reconnect after unexpected peek error %d",
436 length));
437 cifs_reconnect(server);
438 csocket = server->ssocket;
439 wake_up(&server->response_q);
440 continue;
441 } else if (length < 4) {
442 cFYI(1, ("less than four bytes received (%d bytes)",
443 length));
444 pdu_length -= length;
445 msleep(1);
446 goto incomplete_rcv;
447 }
448
449 /* The right amount was read from socket - 4 bytes */
450 /* so we can now interpret the length field */
451
452 /* the first byte big endian of the length field,
453 is actually not part of the length but the type
454 with the most common, zero, as regular data */
455 temp = *((char *) smb_buffer);
456
457 /* Note that FC 1001 length is big endian on the wire,
458 but we convert it here so it is always manipulated
459 as host byte order */
460 pdu_length = ntohl(smb_buffer->smb_buf_length);
461 smb_buffer->smb_buf_length = pdu_length;
462
463 cFYI(1, ("rfc1002 length 0x%x", pdu_length+4));
464
465 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
466 continue;
467 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
468 cFYI(1, ("Good RFC 1002 session rsp"));
469 continue;
470 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
471 /* we get this from Windows 98 instead of
472 an error on SMB negprot response */
473 cFYI(1, ("Negative RFC1002 Session Response Error 0x%x)",
474 pdu_length));
475 if (server->tcpStatus == CifsNew) {
476 /* if nack on negprot (rather than
477 ret of smb negprot error) reconnecting
478 not going to help, ret error to mount */
479 break;
480 } else {
481 /* give server a second to
482 clean up before reconnect attempt */
483 msleep(1000);
484 /* always try 445 first on reconnect
485 since we get NACK on some if we ever
486 connected to port 139 (the NACK is
487 since we do not begin with RFC1001
488 session initialize frame) */
489 server->addr.sockAddr.sin_port =
490 htons(CIFS_PORT);
491 cifs_reconnect(server);
492 csocket = server->ssocket;
493 wake_up(&server->response_q);
494 continue;
495 }
496 } else if (temp != (char) 0) {
497 cERROR(1, ("Unknown RFC 1002 frame"));
498 cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
499 length);
500 cifs_reconnect(server);
501 csocket = server->ssocket;
502 continue;
503 }
504
505 /* else we have an SMB response */
506 if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
507 (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) {
508 cERROR(1, ("Invalid size SMB length %d pdu_length %d",
509 length, pdu_length+4));
510 cifs_reconnect(server);
511 csocket = server->ssocket;
512 wake_up(&server->response_q);
513 continue;
514 }
515
516 /* else length ok */
517 reconnect = 0;
518
519 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
520 isLargeBuf = TRUE;
521 memcpy(bigbuf, smallbuf, 4);
522 smb_buffer = bigbuf;
523 }
524 length = 0;
525 iov.iov_base = 4 + (char *)smb_buffer;
526 iov.iov_len = pdu_length;
527 for (total_read = 0; total_read < pdu_length;
528 total_read += length) {
529 length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
530 pdu_length - total_read, 0);
531 if (kthread_should_stop() ||
532 (length == -EINTR)) {
533 /* then will exit */
534 reconnect = 2;
535 break;
536 } else if (server->tcpStatus == CifsNeedReconnect) {
537 cifs_reconnect(server);
538 csocket = server->ssocket;
539 /* Reconnect wakes up rspns q */
540 /* Now we will reread sock */
541 reconnect = 1;
542 break;
543 } else if ((length == -ERESTARTSYS) ||
544 (length == -EAGAIN)) {
545 msleep(1); /* minimum sleep to prevent looping,
546 allowing socket to clear and app
547 threads to set tcpStatus
548 CifsNeedReconnect if server hung*/
549 length = 0;
550 continue;
551 } else if (length <= 0) {
552 cERROR(1, ("Received no data, expecting %d",
553 pdu_length - total_read));
554 cifs_reconnect(server);
555 csocket = server->ssocket;
556 reconnect = 1;
557 break;
558 }
559 }
560 if (reconnect == 2)
561 break;
562 else if (reconnect == 1)
563 continue;
564
565 length += 4; /* account for rfc1002 hdr */
566
567
568 dump_smb(smb_buffer, length);
569 if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
570 cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
571 continue;
572 }
573
574
575 task_to_wake = NULL;
576 spin_lock(&GlobalMid_Lock);
577 list_for_each(tmp, &server->pending_mid_q) {
578 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
579
580 if ((mid_entry->mid == smb_buffer->Mid) &&
581 (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
582 (mid_entry->command == smb_buffer->Command)) {
583 if (check2ndT2(smb_buffer,server->maxBuf) > 0) {
584 /* We have a multipart transact2 resp */
585 isMultiRsp = TRUE;
586 if (mid_entry->resp_buf) {
587 /* merge response - fix up 1st*/
588 if (coalesce_t2(smb_buffer,
589 mid_entry->resp_buf)) {
590 mid_entry->multiRsp = 1;
591 break;
592 } else {
593 /* all parts received */
594 mid_entry->multiEnd = 1;
595 goto multi_t2_fnd;
596 }
597 } else {
598 if (!isLargeBuf) {
599 cERROR(1,("1st trans2 resp needs bigbuf"));
600 /* BB maybe we can fix this up, switch
601 to already allocated large buffer? */
602 } else {
603 /* Have first buffer */
604 mid_entry->resp_buf =
605 smb_buffer;
606 mid_entry->largeBuf = 1;
607 bigbuf = NULL;
608 }
609 }
610 break;
611 }
612 mid_entry->resp_buf = smb_buffer;
613 if (isLargeBuf)
614 mid_entry->largeBuf = 1;
615 else
616 mid_entry->largeBuf = 0;
617 multi_t2_fnd:
618 task_to_wake = mid_entry->tsk;
619 mid_entry->midState = MID_RESPONSE_RECEIVED;
620 #ifdef CONFIG_CIFS_STATS2
621 mid_entry->when_received = jiffies;
622 #endif
623 /* so we do not time out requests to server
624 which is still responding (since server could
625 be busy but not dead) */
626 server->lstrp = jiffies;
627 break;
628 }
629 }
630 spin_unlock(&GlobalMid_Lock);
631 if (task_to_wake) {
632 /* Was previous buf put in mpx struct for multi-rsp? */
633 if (!isMultiRsp) {
634 /* smb buffer will be freed by user thread */
635 if (isLargeBuf)
636 bigbuf = NULL;
637 else
638 smallbuf = NULL;
639 }
640 wake_up_process(task_to_wake);
641 } else if ((is_valid_oplock_break(smb_buffer, server) == FALSE)
642 && (isMultiRsp == FALSE)) {
643 cERROR(1, ("No task to wake, unknown frame received! "
644 "NumMids %d", midCount.counter));
645 cifs_dump_mem("Received Data is: ", (char *)smb_buffer,
646 sizeof(struct smb_hdr));
647 #ifdef CONFIG_CIFS_DEBUG2
648 cifs_dump_detail(smb_buffer);
649 cifs_dump_mids(server);
650 #endif /* CIFS_DEBUG2 */
651
652 }
653 } /* end while !EXITING */
654
655 spin_lock(&GlobalMid_Lock);
656 server->tcpStatus = CifsExiting;
657 server->tsk = NULL;
658 /* check if we have blocked requests that need to free */
659 /* Note that cifs_max_pending is normally 50, but
660 can be set at module install time to as little as two */
661 if (atomic_read(&server->inFlight) >= cifs_max_pending)
662 atomic_set(&server->inFlight, cifs_max_pending - 1);
663 /* We do not want to set the max_pending too low or we
664 could end up with the counter going negative */
665 spin_unlock(&GlobalMid_Lock);
666 /* Although there should not be any requests blocked on
667 this queue it can not hurt to be paranoid and try to wake up requests
668 that may haven been blocked when more than 50 at time were on the wire
669 to the same server - they now will see the session is in exit state
670 and get out of SendReceive. */
671 wake_up_all(&server->request_q);
672 /* give those requests time to exit */
673 msleep(125);
674
675 if (server->ssocket) {
676 sock_release(csocket);
677 server->ssocket = NULL;
678 }
679 /* buffer usuallly freed in free_mid - need to free it here on exit */
680 cifs_buf_release(bigbuf);
681 if (smallbuf) /* no sense logging a debug message if NULL */
682 cifs_small_buf_release(smallbuf);
683
684 read_lock(&GlobalSMBSeslock);
685 if (list_empty(&server->pending_mid_q)) {
686 /* loop through server session structures attached to this and
687 mark them dead */
688 list_for_each(tmp, &GlobalSMBSessionList) {
689 ses =
690 list_entry(tmp, struct cifsSesInfo,
691 cifsSessionList);
692 if (ses->server == server) {
693 ses->status = CifsExiting;
694 ses->server = NULL;
695 }
696 }
697 read_unlock(&GlobalSMBSeslock);
698 } else {
699 /* although we can not zero the server struct pointer yet,
700 since there are active requests which may depnd on them,
701 mark the corresponding SMB sessions as exiting too */
702 list_for_each(tmp, &GlobalSMBSessionList) {
703 ses = list_entry(tmp, struct cifsSesInfo,
704 cifsSessionList);
705 if (ses->server == server)
706 ses->status = CifsExiting;
707 }
708
709 spin_lock(&GlobalMid_Lock);
710 list_for_each(tmp, &server->pending_mid_q) {
711 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
712 if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
713 cFYI(1, ("Clearing Mid 0x%x - waking up ",
714 mid_entry->mid));
715 task_to_wake = mid_entry->tsk;
716 if (task_to_wake)
717 wake_up_process(task_to_wake);
718 }
719 }
720 spin_unlock(&GlobalMid_Lock);
721 read_unlock(&GlobalSMBSeslock);
722 /* 1/8th of sec is more than enough time for them to exit */
723 msleep(125);
724 }
725
726 if (!list_empty(&server->pending_mid_q)) {
727 /* mpx threads have not exited yet give them
728 at least the smb send timeout time for long ops */
729 /* due to delays on oplock break requests, we need
730 to wait at least 45 seconds before giving up
731 on a request getting a response and going ahead
732 and killing cifsd */
733 cFYI(1, ("Wait for exit from demultiplex thread"));
734 msleep(46000);
735 /* if threads still have not exited they are probably never
736 coming home not much else we can do but free the memory */
737 }
738
739 write_lock(&GlobalSMBSeslock);
740 atomic_dec(&tcpSesAllocCount);
741 length = tcpSesAllocCount.counter;
742
743 /* last chance to mark ses pointers invalid
744 if there are any pointing to this (e.g
745 if a crazy root user tried to kill cifsd
746 kernel thread explicitly this might happen) */
747 list_for_each(tmp, &GlobalSMBSessionList) {
748 ses = list_entry(tmp, struct cifsSesInfo,
749 cifsSessionList);
750 if (ses->server == server)
751 ses->server = NULL;
752 }
753 write_unlock(&GlobalSMBSeslock);
754
755 kfree(server);
756 if (length > 0)
757 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
758 GFP_KERNEL);
759
760 return 0;
761 }
762
763 static int
764 cifs_parse_mount_options(char *options, const char *devname,
765 struct smb_vol *vol)
766 {
767 char *value;
768 char *data;
769 unsigned int temp_len, i, j;
770 char separator[2];
771
772 separator[0] = ',';
773 separator[1] = 0;
774
775 if (Local_System_Name[0] != 0)
776 memcpy(vol->source_rfc1001_name, Local_System_Name, 15);
777 else {
778 char *nodename = utsname()->nodename;
779 int n = strnlen(nodename, 15);
780 memset(vol->source_rfc1001_name, 0x20, 15);
781 for (i = 0; i < n; i++) {
782 /* does not have to be perfect mapping since field is
783 informational, only used for servers that do not support
784 port 445 and it can be overridden at mount time */
785 vol->source_rfc1001_name[i] = toupper(nodename[i]);
786 }
787 }
788 vol->source_rfc1001_name[15] = 0;
789 /* null target name indicates to use *SMBSERVR default called name
790 if we end up sending RFC1001 session initialize */
791 vol->target_rfc1001_name[0] = 0;
792 vol->linux_uid = current->uid; /* current->euid instead? */
793 vol->linux_gid = current->gid;
794 vol->dir_mode = S_IRWXUGO;
795 /* 2767 perms indicate mandatory locking support */
796 vol->file_mode = S_IALLUGO & ~(S_ISUID | S_IXGRP);
797
798 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
799 vol->rw = TRUE;
800 /* default is always to request posix paths. */
801 vol->posix_paths = 1;
802
803 if (!options)
804 return 1;
805
806 if (strncmp(options, "sep=", 4) == 0) {
807 if (options[4] != 0) {
808 separator[0] = options[4];
809 options += 5;
810 } else {
811 cFYI(1, ("Null separator not allowed"));
812 }
813 }
814
815 while ((data = strsep(&options, separator)) != NULL) {
816 if (!*data)
817 continue;
818 if ((value = strchr(data, '=')) != NULL)
819 *value++ = '\0';
820
821 /* Have to parse this before we parse for "user" */
822 if (strnicmp(data, "user_xattr", 10) == 0) {
823 vol->no_xattr = 0;
824 } else if (strnicmp(data, "nouser_xattr", 12) == 0) {
825 vol->no_xattr = 1;
826 } else if (strnicmp(data, "user", 4) == 0) {
827 if (!value) {
828 printk(KERN_WARNING
829 "CIFS: invalid or missing username\n");
830 return 1; /* needs_arg; */
831 } else if (!*value) {
832 /* null user, ie anonymous, authentication */
833 vol->nullauth = 1;
834 }
835 if (strnlen(value, 200) < 200) {
836 vol->username = value;
837 } else {
838 printk(KERN_WARNING "CIFS: username too long\n");
839 return 1;
840 }
841 } else if (strnicmp(data, "pass", 4) == 0) {
842 if (!value) {
843 vol->password = NULL;
844 continue;
845 } else if (value[0] == 0) {
846 /* check if string begins with double comma
847 since that would mean the password really
848 does start with a comma, and would not
849 indicate an empty string */
850 if (value[1] != separator[0]) {
851 vol->password = NULL;
852 continue;
853 }
854 }
855 temp_len = strlen(value);
856 /* removed password length check, NTLM passwords
857 can be arbitrarily long */
858
859 /* if comma in password, the string will be
860 prematurely null terminated. Commas in password are
861 specified across the cifs mount interface by a double
862 comma ie ,, and a comma used as in other cases ie ','
863 as a parameter delimiter/separator is single and due
864 to the strsep above is temporarily zeroed. */
865
866 /* NB: password legally can have multiple commas and
867 the only illegal character in a password is null */
868
869 if ((value[temp_len] == 0) &&
870 (value[temp_len+1] == separator[0])) {
871 /* reinsert comma */
872 value[temp_len] = separator[0];
873 temp_len += 2; /* move after second comma */
874 while (value[temp_len] != 0) {
875 if (value[temp_len] == separator[0]) {
876 if (value[temp_len+1] ==
877 separator[0]) {
878 /* skip second comma */
879 temp_len++;
880 } else {
881 /* single comma indicating start
882 of next parm */
883 break;
884 }
885 }
886 temp_len++;
887 }
888 if (value[temp_len] == 0) {
889 options = NULL;
890 } else {
891 value[temp_len] = 0;
892 /* point option to start of next parm */
893 options = value + temp_len + 1;
894 }
895 /* go from value to value + temp_len condensing
896 double commas to singles. Note that this ends up
897 allocating a few bytes too many, which is ok */
898 vol->password = kzalloc(temp_len, GFP_KERNEL);
899 if (vol->password == NULL) {
900 printk(KERN_WARNING "CIFS: no memory "
901 "for password\n");
902 return 1;
903 }
904 for (i = 0, j = 0; i < temp_len; i++, j++) {
905 vol->password[j] = value[i];
906 if (value[i] == separator[0]
907 && value[i+1] == separator[0]) {
908 /* skip second comma */
909 i++;
910 }
911 }
912 vol->password[j] = 0;
913 } else {
914 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
915 if (vol->password == NULL) {
916 printk(KERN_WARNING "CIFS: no memory "
917 "for password\n");
918 return 1;
919 }
920 strcpy(vol->password, value);
921 }
922 } else if (strnicmp(data, "ip", 2) == 0) {
923 if (!value || !*value) {
924 vol->UNCip = NULL;
925 } else if (strnlen(value, 35) < 35) {
926 vol->UNCip = value;
927 } else {
928 printk(KERN_WARNING "CIFS: ip address "
929 "too long\n");
930 return 1;
931 }
932 } else if (strnicmp(data, "sec", 3) == 0) {
933 if (!value || !*value) {
934 cERROR(1, ("no security value specified"));
935 continue;
936 } else if (strnicmp(value, "krb5i", 5) == 0) {
937 vol->secFlg |= CIFSSEC_MAY_KRB5 |
938 CIFSSEC_MUST_SIGN;
939 } else if (strnicmp(value, "krb5p", 5) == 0) {
940 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
941 CIFSSEC_MAY_KRB5; */
942 cERROR(1, ("Krb5 cifs privacy not supported"));
943 return 1;
944 } else if (strnicmp(value, "krb5", 4) == 0) {
945 vol->secFlg |= CIFSSEC_MAY_KRB5;
946 } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
947 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
948 CIFSSEC_MUST_SIGN;
949 } else if (strnicmp(value, "ntlmv2", 6) == 0) {
950 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
951 } else if (strnicmp(value, "ntlmi", 5) == 0) {
952 vol->secFlg |= CIFSSEC_MAY_NTLM |
953 CIFSSEC_MUST_SIGN;
954 } else if (strnicmp(value, "ntlm", 4) == 0) {
955 /* ntlm is default so can be turned off too */
956 vol->secFlg |= CIFSSEC_MAY_NTLM;
957 } else if (strnicmp(value, "nontlm", 6) == 0) {
958 /* BB is there a better way to do this? */
959 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
960 #ifdef CONFIG_CIFS_WEAK_PW_HASH
961 } else if (strnicmp(value, "lanman", 6) == 0) {
962 vol->secFlg |= CIFSSEC_MAY_LANMAN;
963 #endif
964 } else if (strnicmp(value, "none", 4) == 0) {
965 vol->nullauth = 1;
966 } else {
967 cERROR(1, ("bad security option: %s", value));
968 return 1;
969 }
970 } else if ((strnicmp(data, "unc", 3) == 0)
971 || (strnicmp(data, "target", 6) == 0)
972 || (strnicmp(data, "path", 4) == 0)) {
973 if (!value || !*value) {
974 printk(KERN_WARNING "CIFS: invalid path to "
975 "network resource\n");
976 return 1; /* needs_arg; */
977 }
978 if ((temp_len = strnlen(value, 300)) < 300) {
979 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
980 if (vol->UNC == NULL)
981 return 1;
982 strcpy(vol->UNC, value);
983 if (strncmp(vol->UNC, "//", 2) == 0) {
984 vol->UNC[0] = '\\';
985 vol->UNC[1] = '\\';
986 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
987 printk(KERN_WARNING
988 "CIFS: UNC Path does not begin "
989 "with // or \\\\ \n");
990 return 1;
991 }
992 } else {
993 printk(KERN_WARNING "CIFS: UNC name too long\n");
994 return 1;
995 }
996 } else if ((strnicmp(data, "domain", 3) == 0)
997 || (strnicmp(data, "workgroup", 5) == 0)) {
998 if (!value || !*value) {
999 printk(KERN_WARNING "CIFS: invalid domain name\n");
1000 return 1; /* needs_arg; */
1001 }
1002 /* BB are there cases in which a comma can be valid in
1003 a domain name and need special handling? */
1004 if (strnlen(value, 256) < 256) {
1005 vol->domainname = value;
1006 cFYI(1, ("Domain name set"));
1007 } else {
1008 printk(KERN_WARNING "CIFS: domain name too "
1009 "long\n");
1010 return 1;
1011 }
1012 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1013 if (!value || !*value) {
1014 printk(KERN_WARNING
1015 "CIFS: invalid path prefix\n");
1016 return 1; /* needs_argument */
1017 }
1018 if ((temp_len = strnlen(value, 1024)) < 1024) {
1019 if (value[0] != '/')
1020 temp_len++; /* missing leading slash */
1021 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1022 if (vol->prepath == NULL)
1023 return 1;
1024 if (value[0] != '/') {
1025 vol->prepath[0] = '/';
1026 strcpy(vol->prepath+1, value);
1027 } else
1028 strcpy(vol->prepath, value);
1029 cFYI(1, ("prefix path %s", vol->prepath));
1030 } else {
1031 printk(KERN_WARNING "CIFS: prefix too long\n");
1032 return 1;
1033 }
1034 } else if (strnicmp(data, "iocharset", 9) == 0) {
1035 if (!value || !*value) {
1036 printk(KERN_WARNING "CIFS: invalid iocharset "
1037 "specified\n");
1038 return 1; /* needs_arg; */
1039 }
1040 if (strnlen(value, 65) < 65) {
1041 if (strnicmp(value, "default", 7))
1042 vol->iocharset = value;
1043 /* if iocharset not set then load_nls_default
1044 is used by caller */
1045 cFYI(1, ("iocharset set to %s", value));
1046 } else {
1047 printk(KERN_WARNING "CIFS: iocharset name "
1048 "too long.\n");
1049 return 1;
1050 }
1051 } else if (strnicmp(data, "uid", 3) == 0) {
1052 if (value && *value) {
1053 vol->linux_uid =
1054 simple_strtoul(value, &value, 0);
1055 vol->override_uid = 1;
1056 }
1057 } else if (strnicmp(data, "gid", 3) == 0) {
1058 if (value && *value) {
1059 vol->linux_gid =
1060 simple_strtoul(value, &value, 0);
1061 vol->override_gid = 1;
1062 }
1063 } else if (strnicmp(data, "file_mode", 4) == 0) {
1064 if (value && *value) {
1065 vol->file_mode =
1066 simple_strtoul(value, &value, 0);
1067 }
1068 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1069 if (value && *value) {
1070 vol->dir_mode =
1071 simple_strtoul(value, &value, 0);
1072 }
1073 } else if (strnicmp(data, "dirmode", 4) == 0) {
1074 if (value && *value) {
1075 vol->dir_mode =
1076 simple_strtoul(value, &value, 0);
1077 }
1078 } else if (strnicmp(data, "port", 4) == 0) {
1079 if (value && *value) {
1080 vol->port =
1081 simple_strtoul(value, &value, 0);
1082 }
1083 } else if (strnicmp(data, "rsize", 5) == 0) {
1084 if (value && *value) {
1085 vol->rsize =
1086 simple_strtoul(value, &value, 0);
1087 }
1088 } else if (strnicmp(data, "wsize", 5) == 0) {
1089 if (value && *value) {
1090 vol->wsize =
1091 simple_strtoul(value, &value, 0);
1092 }
1093 } else if (strnicmp(data, "sockopt", 5) == 0) {
1094 if (value && *value) {
1095 vol->sockopt =
1096 simple_strtoul(value, &value, 0);
1097 }
1098 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1099 if (!value || !*value || (*value == ' ')) {
1100 cFYI(1, ("invalid (empty) netbiosname"));
1101 } else {
1102 memset(vol->source_rfc1001_name, 0x20, 15);
1103 for (i = 0; i < 15; i++) {
1104 /* BB are there cases in which a comma can be
1105 valid in this workstation netbios name (and need
1106 special handling)? */
1107
1108 /* We do not uppercase netbiosname for user */
1109 if (value[i] == 0)
1110 break;
1111 else
1112 vol->source_rfc1001_name[i] =
1113 value[i];
1114 }
1115 /* The string has 16th byte zero still from
1116 set at top of the function */
1117 if ((i == 15) && (value[i] != 0))
1118 printk(KERN_WARNING "CIFS: netbiosname"
1119 " longer than 15 truncated.\n");
1120 }
1121 } else if (strnicmp(data, "servern", 7) == 0) {
1122 /* servernetbiosname specified override *SMBSERVER */
1123 if (!value || !*value || (*value == ' ')) {
1124 cFYI(1, ("empty server netbiosname specified"));
1125 } else {
1126 /* last byte, type, is 0x20 for servr type */
1127 memset(vol->target_rfc1001_name, 0x20, 16);
1128
1129 for (i = 0; i < 15; i++) {
1130 /* BB are there cases in which a comma can be
1131 valid in this workstation netbios name
1132 (and need special handling)? */
1133
1134 /* user or mount helper must uppercase
1135 the netbiosname */
1136 if (value[i] == 0)
1137 break;
1138 else
1139 vol->target_rfc1001_name[i] =
1140 value[i];
1141 }
1142 /* The string has 16th byte zero still from
1143 set at top of the function */
1144 if ((i == 15) && (value[i] != 0))
1145 printk(KERN_WARNING "CIFS: server net"
1146 "biosname longer than 15 truncated.\n");
1147 }
1148 } else if (strnicmp(data, "credentials", 4) == 0) {
1149 /* ignore */
1150 } else if (strnicmp(data, "version", 3) == 0) {
1151 /* ignore */
1152 } else if (strnicmp(data, "guest", 5) == 0) {
1153 /* ignore */
1154 } else if (strnicmp(data, "rw", 2) == 0) {
1155 vol->rw = TRUE;
1156 } else if ((strnicmp(data, "suid", 4) == 0) ||
1157 (strnicmp(data, "nosuid", 6) == 0) ||
1158 (strnicmp(data, "exec", 4) == 0) ||
1159 (strnicmp(data, "noexec", 6) == 0) ||
1160 (strnicmp(data, "nodev", 5) == 0) ||
1161 (strnicmp(data, "noauto", 6) == 0) ||
1162 (strnicmp(data, "dev", 3) == 0)) {
1163 /* The mount tool or mount.cifs helper (if present)
1164 uses these opts to set flags, and the flags are read
1165 by the kernel vfs layer before we get here (ie
1166 before read super) so there is no point trying to
1167 parse these options again and set anything and it
1168 is ok to just ignore them */
1169 continue;
1170 } else if (strnicmp(data, "ro", 2) == 0) {
1171 vol->rw = FALSE;
1172 } else if (strnicmp(data, "hard", 4) == 0) {
1173 vol->retry = 1;
1174 } else if (strnicmp(data, "soft", 4) == 0) {
1175 vol->retry = 0;
1176 } else if (strnicmp(data, "perm", 4) == 0) {
1177 vol->noperm = 0;
1178 } else if (strnicmp(data, "noperm", 6) == 0) {
1179 vol->noperm = 1;
1180 } else if (strnicmp(data, "mapchars", 8) == 0) {
1181 vol->remap = 1;
1182 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1183 vol->remap = 0;
1184 } else if (strnicmp(data, "sfu", 3) == 0) {
1185 vol->sfu_emul = 1;
1186 } else if (strnicmp(data, "nosfu", 5) == 0) {
1187 vol->sfu_emul = 0;
1188 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1189 vol->posix_paths = 1;
1190 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1191 vol->posix_paths = 0;
1192 } else if (strnicmp(data, "nounix", 6) == 0) {
1193 vol->no_linux_ext = 1;
1194 } else if (strnicmp(data, "nolinux", 7) == 0) {
1195 vol->no_linux_ext = 1;
1196 } else if ((strnicmp(data, "nocase", 6) == 0) ||
1197 (strnicmp(data, "ignorecase", 10) == 0)) {
1198 vol->nocase = 1;
1199 } else if (strnicmp(data, "brl", 3) == 0) {
1200 vol->nobrl = 0;
1201 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
1202 (strnicmp(data, "nolock", 6) == 0)) {
1203 vol->nobrl = 1;
1204 /* turn off mandatory locking in mode
1205 if remote locking is turned off since the
1206 local vfs will do advisory */
1207 if (vol->file_mode ==
1208 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1209 vol->file_mode = S_IALLUGO;
1210 } else if (strnicmp(data, "setuids", 7) == 0) {
1211 vol->setuids = 1;
1212 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1213 vol->setuids = 0;
1214 } else if (strnicmp(data, "nohard", 6) == 0) {
1215 vol->retry = 0;
1216 } else if (strnicmp(data, "nosoft", 6) == 0) {
1217 vol->retry = 1;
1218 } else if (strnicmp(data, "nointr", 6) == 0) {
1219 vol->intr = 0;
1220 } else if (strnicmp(data, "intr", 4) == 0) {
1221 vol->intr = 1;
1222 } else if (strnicmp(data, "serverino", 7) == 0) {
1223 vol->server_ino = 1;
1224 } else if (strnicmp(data, "noserverino", 9) == 0) {
1225 vol->server_ino = 0;
1226 } else if (strnicmp(data, "cifsacl", 7) == 0) {
1227 vol->cifs_acl = 1;
1228 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1229 vol->cifs_acl = 0;
1230 } else if (strnicmp(data, "acl", 3) == 0) {
1231 vol->no_psx_acl = 0;
1232 } else if (strnicmp(data, "noacl", 5) == 0) {
1233 vol->no_psx_acl = 1;
1234 } else if (strnicmp(data, "sign", 4) == 0) {
1235 vol->secFlg |= CIFSSEC_MUST_SIGN;
1236 /* } else if (strnicmp(data, "seal",4) == 0) {
1237 vol->secFlg |= CIFSSEC_MUST_SEAL; */
1238 } else if (strnicmp(data, "direct", 6) == 0) {
1239 vol->direct_io = 1;
1240 } else if (strnicmp(data, "forcedirectio", 13) == 0) {
1241 vol->direct_io = 1;
1242 } else if (strnicmp(data, "in6_addr", 8) == 0) {
1243 if (!value || !*value) {
1244 vol->in6_addr = NULL;
1245 } else if (strnlen(value, 49) == 48) {
1246 vol->in6_addr = value;
1247 } else {
1248 printk(KERN_WARNING "CIFS: ip v6 address not "
1249 "48 characters long\n");
1250 return 1;
1251 }
1252 } else if (strnicmp(data, "noac", 4) == 0) {
1253 printk(KERN_WARNING "CIFS: Mount option noac not "
1254 "supported. Instead set "
1255 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
1256 } else
1257 printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
1258 data);
1259 }
1260 if (vol->UNC == NULL) {
1261 if (devname == NULL) {
1262 printk(KERN_WARNING "CIFS: Missing UNC name for mount "
1263 "target\n");
1264 return 1;
1265 }
1266 if ((temp_len = strnlen(devname, 300)) < 300) {
1267 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1268 if (vol->UNC == NULL)
1269 return 1;
1270 strcpy(vol->UNC, devname);
1271 if (strncmp(vol->UNC, "//", 2) == 0) {
1272 vol->UNC[0] = '\\';
1273 vol->UNC[1] = '\\';
1274 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1275 printk(KERN_WARNING "CIFS: UNC Path does not "
1276 "begin with // or \\\\ \n");
1277 return 1;
1278 }
1279 } else {
1280 printk(KERN_WARNING "CIFS: UNC name too long\n");
1281 return 1;
1282 }
1283 }
1284 if (vol->UNCip == NULL)
1285 vol->UNCip = &vol->UNC[2];
1286
1287 return 0;
1288 }
1289
1290 static struct cifsSesInfo *
1291 cifs_find_tcp_session(struct in_addr *target_ip_addr,
1292 struct in6_addr *target_ip6_addr,
1293 char *userName, struct TCP_Server_Info **psrvTcp)
1294 {
1295 struct list_head *tmp;
1296 struct cifsSesInfo *ses;
1297 *psrvTcp = NULL;
1298 read_lock(&GlobalSMBSeslock);
1299
1300 list_for_each(tmp, &GlobalSMBSessionList) {
1301 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
1302 if (ses->server) {
1303 if ((target_ip_addr &&
1304 (ses->server->addr.sockAddr.sin_addr.s_addr
1305 == target_ip_addr->s_addr)) || (target_ip6_addr
1306 && memcmp(&ses->server->addr.sockAddr6.sin6_addr,
1307 target_ip6_addr, sizeof(*target_ip6_addr)))) {
1308 /* BB lock server and tcp session and increment
1309 use count here?? */
1310
1311 /* found a match on the TCP session */
1312 *psrvTcp = ses->server;
1313
1314 /* BB check if reconnection needed */
1315 if (strncmp
1316 (ses->userName, userName,
1317 MAX_USERNAME_SIZE) == 0){
1318 read_unlock(&GlobalSMBSeslock);
1319 /* Found exact match on both TCP and
1320 SMB sessions */
1321 return ses;
1322 }
1323 }
1324 }
1325 /* else tcp and smb sessions need reconnection */
1326 }
1327 read_unlock(&GlobalSMBSeslock);
1328 return NULL;
1329 }
1330
1331 static struct cifsTconInfo *
1332 find_unc(__be32 new_target_ip_addr, char *uncName, char *userName)
1333 {
1334 struct list_head *tmp;
1335 struct cifsTconInfo *tcon;
1336
1337 read_lock(&GlobalSMBSeslock);
1338 list_for_each(tmp, &GlobalTreeConnectionList) {
1339 cFYI(1, ("Next tcon"));
1340 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
1341 if (tcon->ses) {
1342 if (tcon->ses->server) {
1343 cFYI(1,
1344 ("old ip addr: %x == new ip %x ?",
1345 tcon->ses->server->addr.sockAddr.sin_addr.
1346 s_addr, new_target_ip_addr));
1347 if (tcon->ses->server->addr.sockAddr.sin_addr.
1348 s_addr == new_target_ip_addr) {
1349 /* BB lock tcon, server and tcp session and increment use count here? */
1350 /* found a match on the TCP session */
1351 /* BB check if reconnection needed */
1352 cFYI(1,
1353 ("IP match, old UNC: %s new: %s",
1354 tcon->treeName, uncName));
1355 if (strncmp
1356 (tcon->treeName, uncName,
1357 MAX_TREE_SIZE) == 0) {
1358 cFYI(1,
1359 ("and old usr: %s new: %s",
1360 tcon->treeName, uncName));
1361 if (strncmp
1362 (tcon->ses->userName,
1363 userName,
1364 MAX_USERNAME_SIZE) == 0) {
1365 read_unlock(&GlobalSMBSeslock);
1366 /* matched smb session
1367 (user name */
1368 return tcon;
1369 }
1370 }
1371 }
1372 }
1373 }
1374 }
1375 read_unlock(&GlobalSMBSeslock);
1376 return NULL;
1377 }
1378
1379 int
1380 connect_to_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
1381 const char *old_path, const struct nls_table *nls_codepage,
1382 int remap)
1383 {
1384 unsigned char *referrals = NULL;
1385 unsigned int num_referrals;
1386 int rc = 0;
1387
1388 rc = get_dfs_path(xid, pSesInfo, old_path, nls_codepage,
1389 &num_referrals, &referrals, remap);
1390
1391 /* BB Add in code to: if valid refrl, if not ip address contact
1392 the helper that resolves tcp names, mount to it, try to
1393 tcon to it unmount it if fail */
1394
1395 kfree(referrals);
1396
1397 return rc;
1398 }
1399
1400 int
1401 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
1402 const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
1403 unsigned char **preferrals, int remap)
1404 {
1405 char *temp_unc;
1406 int rc = 0;
1407
1408 *pnum_referrals = 0;
1409
1410 if (pSesInfo->ipc_tid == 0) {
1411 temp_unc = kmalloc(2 /* for slashes */ +
1412 strnlen(pSesInfo->serverName,
1413 SERVER_NAME_LEN_WITH_NULL * 2)
1414 + 1 + 4 /* slash IPC$ */ + 2,
1415 GFP_KERNEL);
1416 if (temp_unc == NULL)
1417 return -ENOMEM;
1418 temp_unc[0] = '\\';
1419 temp_unc[1] = '\\';
1420 strcpy(temp_unc + 2, pSesInfo->serverName);
1421 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1422 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1423 cFYI(1,
1424 ("CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid));
1425 kfree(temp_unc);
1426 }
1427 if (rc == 0)
1428 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
1429 pnum_referrals, nls_codepage, remap);
1430
1431 return rc;
1432 }
1433
1434 /* See RFC1001 section 14 on representation of Netbios names */
1435 static void rfc1002mangle(char *target, char *source, unsigned int length)
1436 {
1437 unsigned int i, j;
1438
1439 for (i = 0, j = 0; i < (length); i++) {
1440 /* mask a nibble at a time and encode */
1441 target[j] = 'A' + (0x0F & (source[i] >> 4));
1442 target[j+1] = 'A' + (0x0F & source[i]);
1443 j += 2;
1444 }
1445
1446 }
1447
1448
1449 static int
1450 ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket,
1451 char *netbios_name, char *target_name)
1452 {
1453 int rc = 0;
1454 int connected = 0;
1455 __be16 orig_port = 0;
1456
1457 if (*csocket == NULL) {
1458 rc = sock_create_kern(PF_INET, SOCK_STREAM,
1459 IPPROTO_TCP, csocket);
1460 if (rc < 0) {
1461 cERROR(1, ("Error %d creating socket", rc));
1462 *csocket = NULL;
1463 return rc;
1464 } else {
1465 /* BB other socket options to set KEEPALIVE, NODELAY? */
1466 cFYI(1, ("Socket created"));
1467 (*csocket)->sk->sk_allocation = GFP_NOFS;
1468 }
1469 }
1470
1471 psin_server->sin_family = AF_INET;
1472 if (psin_server->sin_port) { /* user overrode default port */
1473 rc = (*csocket)->ops->connect(*csocket,
1474 (struct sockaddr *) psin_server,
1475 sizeof(struct sockaddr_in), 0);
1476 if (rc >= 0)
1477 connected = 1;
1478 }
1479
1480 if (!connected) {
1481 /* save original port so we can retry user specified port
1482 later if fall back ports fail this time */
1483 orig_port = psin_server->sin_port;
1484
1485 /* do not retry on the same port we just failed on */
1486 if (psin_server->sin_port != htons(CIFS_PORT)) {
1487 psin_server->sin_port = htons(CIFS_PORT);
1488
1489 rc = (*csocket)->ops->connect(*csocket,
1490 (struct sockaddr *) psin_server,
1491 sizeof(struct sockaddr_in), 0);
1492 if (rc >= 0)
1493 connected = 1;
1494 }
1495 }
1496 if (!connected) {
1497 psin_server->sin_port = htons(RFC1001_PORT);
1498 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1499 psin_server,
1500 sizeof(struct sockaddr_in), 0);
1501 if (rc >= 0)
1502 connected = 1;
1503 }
1504
1505 /* give up here - unless we want to retry on different
1506 protocol families some day */
1507 if (!connected) {
1508 if (orig_port)
1509 psin_server->sin_port = orig_port;
1510 cFYI(1, ("Error %d connecting to server via ipv4", rc));
1511 sock_release(*csocket);
1512 *csocket = NULL;
1513 return rc;
1514 }
1515 /* Eventually check for other socket options to change from
1516 the default. sock_setsockopt not used because it expects
1517 user space buffer */
1518 cFYI(1, ("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
1519 (*csocket)->sk->sk_sndbuf,
1520 (*csocket)->sk->sk_rcvbuf, (*csocket)->sk->sk_rcvtimeo));
1521 (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1522 /* make the bufsizes depend on wsize/rsize and max requests */
1523 if ((*csocket)->sk->sk_sndbuf < (200 * 1024))
1524 (*csocket)->sk->sk_sndbuf = 200 * 1024;
1525 if ((*csocket)->sk->sk_rcvbuf < (140 * 1024))
1526 (*csocket)->sk->sk_rcvbuf = 140 * 1024;
1527
1528 /* send RFC1001 sessinit */
1529 if (psin_server->sin_port == htons(RFC1001_PORT)) {
1530 /* some servers require RFC1001 sessinit before sending
1531 negprot - BB check reconnection in case where second
1532 sessinit is sent but no second negprot */
1533 struct rfc1002_session_packet *ses_init_buf;
1534 struct smb_hdr *smb_buf;
1535 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
1536 GFP_KERNEL);
1537 if (ses_init_buf) {
1538 ses_init_buf->trailer.session_req.called_len = 32;
1539 if (target_name && (target_name[0] != 0)) {
1540 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1541 target_name, 16);
1542 } else {
1543 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1544 DEFAULT_CIFS_CALLED_NAME, 16);
1545 }
1546
1547 ses_init_buf->trailer.session_req.calling_len = 32;
1548 /* calling name ends in null (byte 16) from old smb
1549 convention. */
1550 if (netbios_name && (netbios_name[0] != 0)) {
1551 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1552 netbios_name, 16);
1553 } else {
1554 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1555 "LINUX_CIFS_CLNT", 16);
1556 }
1557 ses_init_buf->trailer.session_req.scope1 = 0;
1558 ses_init_buf->trailer.session_req.scope2 = 0;
1559 smb_buf = (struct smb_hdr *)ses_init_buf;
1560 /* sizeof RFC1002_SESSION_REQUEST with no scope */
1561 smb_buf->smb_buf_length = 0x81000044;
1562 rc = smb_send(*csocket, smb_buf, 0x44,
1563 (struct sockaddr *)psin_server);
1564 kfree(ses_init_buf);
1565 msleep(1); /* RFC1001 layer in at least one server
1566 requires very short break before negprot
1567 presumably because not expecting negprot
1568 to follow so fast. This is a simple
1569 solution that works without
1570 complicating the code and causes no
1571 significant slowing down on mount
1572 for everyone else */
1573 }
1574 /* else the negprot may still work without this
1575 even though malloc failed */
1576
1577 }
1578
1579 return rc;
1580 }
1581
1582 static int
1583 ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket)
1584 {
1585 int rc = 0;
1586 int connected = 0;
1587 __be16 orig_port = 0;
1588
1589 if (*csocket == NULL) {
1590 rc = sock_create_kern(PF_INET6, SOCK_STREAM,
1591 IPPROTO_TCP, csocket);
1592 if (rc < 0) {
1593 cERROR(1, ("Error %d creating ipv6 socket", rc));
1594 *csocket = NULL;
1595 return rc;
1596 } else {
1597 /* BB other socket options to set KEEPALIVE, NODELAY? */
1598 cFYI(1, ("ipv6 Socket created"));
1599 (*csocket)->sk->sk_allocation = GFP_NOFS;
1600 }
1601 }
1602
1603 psin_server->sin6_family = AF_INET6;
1604
1605 if (psin_server->sin6_port) { /* user overrode default port */
1606 rc = (*csocket)->ops->connect(*csocket,
1607 (struct sockaddr *) psin_server,
1608 sizeof(struct sockaddr_in6), 0);
1609 if (rc >= 0)
1610 connected = 1;
1611 }
1612
1613 if (!connected) {
1614 /* save original port so we can retry user specified port
1615 later if fall back ports fail this time */
1616
1617 orig_port = psin_server->sin6_port;
1618 /* do not retry on the same port we just failed on */
1619 if (psin_server->sin6_port != htons(CIFS_PORT)) {
1620 psin_server->sin6_port = htons(CIFS_PORT);
1621
1622 rc = (*csocket)->ops->connect(*csocket,
1623 (struct sockaddr *) psin_server,
1624 sizeof(struct sockaddr_in6), 0);
1625 if (rc >= 0)
1626 connected = 1;
1627 }
1628 }
1629 if (!connected) {
1630 psin_server->sin6_port = htons(RFC1001_PORT);
1631 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1632 psin_server, sizeof(struct sockaddr_in6), 0);
1633 if (rc >= 0)
1634 connected = 1;
1635 }
1636
1637 /* give up here - unless we want to retry on different
1638 protocol families some day */
1639 if (!connected) {
1640 if (orig_port)
1641 psin_server->sin6_port = orig_port;
1642 cFYI(1, ("Error %d connecting to server via ipv6", rc));
1643 sock_release(*csocket);
1644 *csocket = NULL;
1645 return rc;
1646 }
1647 /* Eventually check for other socket options to change from
1648 the default. sock_setsockopt not used because it expects
1649 user space buffer */
1650 (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1651
1652 return rc;
1653 }
1654
1655 void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
1656 struct super_block *sb, struct smb_vol *vol_info)
1657 {
1658 /* if we are reconnecting then should we check to see if
1659 * any requested capabilities changed locally e.g. via
1660 * remount but we can not do much about it here
1661 * if they have (even if we could detect it by the following)
1662 * Perhaps we could add a backpointer to array of sb from tcon
1663 * or if we change to make all sb to same share the same
1664 * sb as NFS - then we only have one backpointer to sb.
1665 * What if we wanted to mount the server share twice once with
1666 * and once without posixacls or posix paths? */
1667 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1668
1669 if (vol_info && vol_info->no_linux_ext) {
1670 tcon->fsUnixInfo.Capability = 0;
1671 tcon->unix_ext = 0; /* Unix Extensions disabled */
1672 cFYI(1, ("Linux protocol extensions disabled"));
1673 return;
1674 } else if (vol_info)
1675 tcon->unix_ext = 1; /* Unix Extensions supported */
1676
1677 if (tcon->unix_ext == 0) {
1678 cFYI(1, ("Unix extensions disabled so not set on reconnect"));
1679 return;
1680 }
1681
1682 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
1683 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1684
1685 /* check for reconnect case in which we do not
1686 want to change the mount behavior if we can avoid it */
1687 if (vol_info == NULL) {
1688 /* turn off POSIX ACL and PATHNAMES if not set
1689 originally at mount time */
1690 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
1691 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1692 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0)
1693 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1694 }
1695
1696 cap &= CIFS_UNIX_CAP_MASK;
1697 if (vol_info && vol_info->no_psx_acl)
1698 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1699 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
1700 cFYI(1, ("negotiated posix acl support"));
1701 if (sb)
1702 sb->s_flags |= MS_POSIXACL;
1703 }
1704
1705 if (vol_info && vol_info->posix_paths == 0)
1706 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1707 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
1708 cFYI(1, ("negotiate posix pathnames"));
1709 if (sb)
1710 CIFS_SB(sb)->mnt_cifs_flags |=
1711 CIFS_MOUNT_POSIX_PATHS;
1712 }
1713
1714 /* We might be setting the path sep back to a different
1715 form if we are reconnecting and the server switched its
1716 posix path capability for this share */
1717 if (sb && (CIFS_SB(sb)->prepathlen > 0))
1718 CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
1719
1720 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
1721 if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
1722 CIFS_SB(sb)->rsize = 127 * 1024;
1723 #ifdef CONFIG_CIFS_DEBUG2
1724 cFYI(1, ("larger reads not supported by srv"));
1725 #endif
1726 }
1727 }
1728
1729
1730 cFYI(1, ("Negotiate caps 0x%x", (int)cap));
1731 #ifdef CONFIG_CIFS_DEBUG2
1732 if (cap & CIFS_UNIX_FCNTL_CAP)
1733 cFYI(1, ("FCNTL cap"));
1734 if (cap & CIFS_UNIX_EXTATTR_CAP)
1735 cFYI(1, ("EXTATTR cap"));
1736 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
1737 cFYI(1, ("POSIX path cap"));
1738 if (cap & CIFS_UNIX_XATTR_CAP)
1739 cFYI(1, ("XATTR cap"));
1740 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
1741 cFYI(1, ("POSIX ACL cap"));
1742 if (cap & CIFS_UNIX_LARGE_READ_CAP)
1743 cFYI(1, ("very large read cap"));
1744 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
1745 cFYI(1, ("very large write cap"));
1746 #endif /* CIFS_DEBUG2 */
1747 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
1748 if (vol_info == NULL) {
1749 cFYI(1, ("resetting capabilities failed"));
1750 } else
1751 cERROR(1, ("Negotiating Unix capabilities "
1752 "with the server failed. Consider "
1753 "mounting with the Unix Extensions\n"
1754 "disabled, if problems are found, "
1755 "by specifying the nounix mount "
1756 "option."));
1757
1758 }
1759 }
1760 }
1761
1762 int
1763 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
1764 char *mount_data, const char *devname)
1765 {
1766 int rc = 0;
1767 int xid;
1768 int address_type = AF_INET;
1769 struct socket *csocket = NULL;
1770 struct sockaddr_in sin_server;
1771 struct sockaddr_in6 sin_server6;
1772 struct smb_vol volume_info;
1773 struct cifsSesInfo *pSesInfo = NULL;
1774 struct cifsSesInfo *existingCifsSes = NULL;
1775 struct cifsTconInfo *tcon = NULL;
1776 struct TCP_Server_Info *srvTcp = NULL;
1777
1778 xid = GetXid();
1779
1780 /* cFYI(1, ("Entering cifs_mount. Xid: %d with: %s", xid, mount_data)); */
1781
1782 memset(&volume_info, 0, sizeof(struct smb_vol));
1783 if (cifs_parse_mount_options(mount_data, devname, &volume_info)) {
1784 kfree(volume_info.UNC);
1785 kfree(volume_info.password);
1786 kfree(volume_info.prepath);
1787 FreeXid(xid);
1788 return -EINVAL;
1789 }
1790
1791 if (volume_info.nullauth) {
1792 cFYI(1, ("null user"));
1793 volume_info.username = NULL;
1794 } else if (volume_info.username) {
1795 /* BB fixme parse for domain name here */
1796 cFYI(1, ("Username: %s", volume_info.username));
1797 } else {
1798 cifserror("No username specified");
1799 /* In userspace mount helper we can get user name from alternate
1800 locations such as env variables and files on disk */
1801 kfree(volume_info.UNC);
1802 kfree(volume_info.password);
1803 kfree(volume_info.prepath);
1804 FreeXid(xid);
1805 return -EINVAL;
1806 }
1807
1808 if (volume_info.UNCip && volume_info.UNC) {
1809 rc = cifs_inet_pton(AF_INET, volume_info.UNCip,
1810 &sin_server.sin_addr.s_addr);
1811
1812 if (rc <= 0) {
1813 /* not ipv4 address, try ipv6 */
1814 rc = cifs_inet_pton(AF_INET6, volume_info.UNCip,
1815 &sin_server6.sin6_addr.in6_u);
1816 if (rc > 0)
1817 address_type = AF_INET6;
1818 } else {
1819 address_type = AF_INET;
1820 }
1821
1822 if (rc <= 0) {
1823 /* we failed translating address */
1824 kfree(volume_info.UNC);
1825 kfree(volume_info.password);
1826 kfree(volume_info.prepath);
1827 FreeXid(xid);
1828 return -EINVAL;
1829 }
1830
1831 cFYI(1, ("UNC: %s ip: %s", volume_info.UNC, volume_info.UNCip));
1832 /* success */
1833 rc = 0;
1834 } else if (volume_info.UNCip) {
1835 /* BB using ip addr as server name to connect to the
1836 DFS root below */
1837 cERROR(1, ("Connecting to DFS root not implemented yet"));
1838 kfree(volume_info.UNC);
1839 kfree(volume_info.password);
1840 kfree(volume_info.prepath);
1841 FreeXid(xid);
1842 return -EINVAL;
1843 } else /* which servers DFS root would we conect to */ {
1844 cERROR(1,
1845 ("CIFS mount error: No UNC path (e.g. -o "
1846 "unc=//192.168.1.100/public) specified"));
1847 kfree(volume_info.UNC);
1848 kfree(volume_info.password);
1849 kfree(volume_info.prepath);
1850 FreeXid(xid);
1851 return -EINVAL;
1852 }
1853
1854 /* this is needed for ASCII cp to Unicode converts */
1855 if (volume_info.iocharset == NULL) {
1856 cifs_sb->local_nls = load_nls_default();
1857 /* load_nls_default can not return null */
1858 } else {
1859 cifs_sb->local_nls = load_nls(volume_info.iocharset);
1860 if (cifs_sb->local_nls == NULL) {
1861 cERROR(1, ("CIFS mount error: iocharset %s not found",
1862 volume_info.iocharset));
1863 kfree(volume_info.UNC);
1864 kfree(volume_info.password);
1865 kfree(volume_info.prepath);
1866 FreeXid(xid);
1867 return -ELIBACC;
1868 }
1869 }
1870
1871 if (address_type == AF_INET)
1872 existingCifsSes = cifs_find_tcp_session(&sin_server.sin_addr,
1873 NULL /* no ipv6 addr */,
1874 volume_info.username, &srvTcp);
1875 else if (address_type == AF_INET6) {
1876 cFYI(1, ("looking for ipv6 address"));
1877 existingCifsSes = cifs_find_tcp_session(NULL /* no ipv4 addr */,
1878 &sin_server6.sin6_addr,
1879 volume_info.username, &srvTcp);
1880 } else {
1881 kfree(volume_info.UNC);
1882 kfree(volume_info.password);
1883 kfree(volume_info.prepath);
1884 FreeXid(xid);
1885 return -EINVAL;
1886 }
1887
1888 if (srvTcp) {
1889 cFYI(1, ("Existing tcp session with server found"));
1890 } else { /* create socket */
1891 if (volume_info.port)
1892 sin_server.sin_port = htons(volume_info.port);
1893 else
1894 sin_server.sin_port = 0;
1895 if (address_type == AF_INET6) {
1896 cFYI(1, ("attempting ipv6 connect"));
1897 /* BB should we allow ipv6 on port 139? */
1898 /* other OS never observed in Wild doing 139 with v6 */
1899 rc = ipv6_connect(&sin_server6, &csocket);
1900 } else
1901 rc = ipv4_connect(&sin_server, &csocket,
1902 volume_info.source_rfc1001_name,
1903 volume_info.target_rfc1001_name);
1904 if (rc < 0) {
1905 cERROR(1, ("Error connecting to IPv4 socket. "
1906 "Aborting operation"));
1907 if (csocket != NULL)
1908 sock_release(csocket);
1909 kfree(volume_info.UNC);
1910 kfree(volume_info.password);
1911 kfree(volume_info.prepath);
1912 FreeXid(xid);
1913 return rc;
1914 }
1915
1916 srvTcp = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
1917 if (!srvTcp) {
1918 rc = -ENOMEM;
1919 sock_release(csocket);
1920 kfree(volume_info.UNC);
1921 kfree(volume_info.password);
1922 kfree(volume_info.prepath);
1923 FreeXid(xid);
1924 return rc;
1925 } else {
1926 memcpy(&srvTcp->addr.sockAddr, &sin_server,
1927 sizeof(struct sockaddr_in));
1928 atomic_set(&srvTcp->inFlight, 0);
1929 /* BB Add code for ipv6 case too */
1930 srvTcp->ssocket = csocket;
1931 srvTcp->protocolType = IPV4;
1932 init_waitqueue_head(&srvTcp->response_q);
1933 init_waitqueue_head(&srvTcp->request_q);
1934 INIT_LIST_HEAD(&srvTcp->pending_mid_q);
1935 /* at this point we are the only ones with the pointer
1936 to the struct since the kernel thread not created yet
1937 so no need to spinlock this init of tcpStatus */
1938 srvTcp->tcpStatus = CifsNew;
1939 init_MUTEX(&srvTcp->tcpSem);
1940 srvTcp->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, srvTcp, "cifsd");
1941 if ( IS_ERR(srvTcp->tsk) ) {
1942 rc = PTR_ERR(srvTcp->tsk);
1943 cERROR(1, ("error %d create cifsd thread", rc));
1944 srvTcp->tsk = NULL;
1945 sock_release(csocket);
1946 kfree(volume_info.UNC);
1947 kfree(volume_info.password);
1948 kfree(volume_info.prepath);
1949 FreeXid(xid);
1950 return rc;
1951 }
1952 wait_for_completion(&cifsd_complete);
1953 rc = 0;
1954 memcpy(srvTcp->workstation_RFC1001_name,
1955 volume_info.source_rfc1001_name, 16);
1956 memcpy(srvTcp->server_RFC1001_name,
1957 volume_info.target_rfc1001_name, 16);
1958 srvTcp->sequence_number = 0;
1959 }
1960 }
1961
1962 if (existingCifsSes) {
1963 pSesInfo = existingCifsSes;
1964 cFYI(1, ("Existing smb sess found"));
1965 kfree(volume_info.password);
1966 /* volume_info.UNC freed at end of function */
1967 } else if (!rc) {
1968 cFYI(1, ("Existing smb sess not found"));
1969 pSesInfo = sesInfoAlloc();
1970 if (pSesInfo == NULL)
1971 rc = -ENOMEM;
1972 else {
1973 pSesInfo->server = srvTcp;
1974 sprintf(pSesInfo->serverName, "%u.%u.%u.%u",
1975 NIPQUAD(sin_server.sin_addr.s_addr));
1976 }
1977
1978 if (!rc) {
1979 /* volume_info.password freed at unmount */
1980 if (volume_info.password)
1981 pSesInfo->password = volume_info.password;
1982 if (volume_info.username)
1983 strncpy(pSesInfo->userName,
1984 volume_info.username,
1985 MAX_USERNAME_SIZE);
1986 if (volume_info.domainname) {
1987 int len = strlen(volume_info.domainname);
1988 pSesInfo->domainName =
1989 kmalloc(len + 1, GFP_KERNEL);
1990 if (pSesInfo->domainName)
1991 strcpy(pSesInfo->domainName,
1992 volume_info.domainname);
1993 }
1994 pSesInfo->linux_uid = volume_info.linux_uid;
1995 pSesInfo->overrideSecFlg = volume_info.secFlg;
1996 down(&pSesInfo->sesSem);
1997 /* BB FIXME need to pass vol->secFlgs BB */
1998 rc = cifs_setup_session(xid, pSesInfo,
1999 cifs_sb->local_nls);
2000 up(&pSesInfo->sesSem);
2001 if (!rc)
2002 atomic_inc(&srvTcp->socketUseCount);
2003 } else
2004 kfree(volume_info.password);
2005 }
2006
2007 /* search for existing tcon to this server share */
2008 if (!rc) {
2009 if (volume_info.rsize > CIFSMaxBufSize) {
2010 cERROR(1, ("rsize %d too large, using MaxBufSize",
2011 volume_info.rsize));
2012 cifs_sb->rsize = CIFSMaxBufSize;
2013 } else if ((volume_info.rsize) &&
2014 (volume_info.rsize <= CIFSMaxBufSize))
2015 cifs_sb->rsize = volume_info.rsize;
2016 else /* default */
2017 cifs_sb->rsize = CIFSMaxBufSize;
2018
2019 if (volume_info.wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
2020 cERROR(1, ("wsize %d too large, using 4096 instead",
2021 volume_info.wsize));
2022 cifs_sb->wsize = 4096;
2023 } else if (volume_info.wsize)
2024 cifs_sb->wsize = volume_info.wsize;
2025 else
2026 cifs_sb->wsize =
2027 min_t(const int, PAGEVEC_SIZE * PAGE_CACHE_SIZE,
2028 127*1024);
2029 /* old default of CIFSMaxBufSize was too small now
2030 that SMB Write2 can send multiple pages in kvec.
2031 RFC1001 does not describe what happens when frame
2032 bigger than 128K is sent so use that as max in
2033 conjunction with 52K kvec constraint on arch with 4K
2034 page size */
2035
2036 if (cifs_sb->rsize < 2048) {
2037 cifs_sb->rsize = 2048;
2038 /* Windows ME may prefer this */
2039 cFYI(1, ("readsize set to minimum: 2048"));
2040 }
2041 /* calculate prepath */
2042 cifs_sb->prepath = volume_info.prepath;
2043 if (cifs_sb->prepath) {
2044 cifs_sb->prepathlen = strlen(cifs_sb->prepath);
2045 cifs_sb->prepath[0] = CIFS_DIR_SEP(cifs_sb);
2046 volume_info.prepath = NULL;
2047 } else
2048 cifs_sb->prepathlen = 0;
2049 cifs_sb->mnt_uid = volume_info.linux_uid;
2050 cifs_sb->mnt_gid = volume_info.linux_gid;
2051 cifs_sb->mnt_file_mode = volume_info.file_mode;
2052 cifs_sb->mnt_dir_mode = volume_info.dir_mode;
2053 cFYI(1, ("file mode: 0x%x dir mode: 0x%x",
2054 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode));
2055
2056 if (volume_info.noperm)
2057 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2058 if (volume_info.setuids)
2059 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2060 if (volume_info.server_ino)
2061 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2062 if (volume_info.remap)
2063 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2064 if (volume_info.no_xattr)
2065 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2066 if (volume_info.sfu_emul)
2067 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2068 if (volume_info.nobrl)
2069 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
2070 if (volume_info.cifs_acl)
2071 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2072 if (volume_info.override_uid)
2073 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2074 if (volume_info.override_gid)
2075 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2076 if (volume_info.direct_io) {
2077 cFYI(1, ("mounting share using direct i/o"));
2078 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2079 }
2080
2081 tcon =
2082 find_unc(sin_server.sin_addr.s_addr, volume_info.UNC,
2083 volume_info.username);
2084 if (tcon) {
2085 cFYI(1, ("Found match on UNC path"));
2086 /* we can have only one retry value for a connection
2087 to a share so for resources mounted more than once
2088 to the same server share the last value passed in
2089 for the retry flag is used */
2090 tcon->retry = volume_info.retry;
2091 tcon->nocase = volume_info.nocase;
2092 } else {
2093 tcon = tconInfoAlloc();
2094 if (tcon == NULL)
2095 rc = -ENOMEM;
2096 else {
2097 /* check for null share name ie connecting to
2098 * dfs root */
2099
2100 /* BB check if this works for exactly length
2101 * three strings */
2102 if ((strchr(volume_info.UNC + 3, '\\') == NULL)
2103 && (strchr(volume_info.UNC + 3, '/') ==
2104 NULL)) {
2105 rc = connect_to_dfs_path(xid, pSesInfo,
2106 "", cifs_sb->local_nls,
2107 cifs_sb->mnt_cifs_flags &
2108 CIFS_MOUNT_MAP_SPECIAL_CHR);
2109 kfree(volume_info.UNC);
2110 FreeXid(xid);
2111 return -ENODEV;
2112 } else {
2113 /* BB Do we need to wrap sesSem around
2114 * this TCon call and Unix SetFS as
2115 * we do on SessSetup and reconnect? */
2116 rc = CIFSTCon(xid, pSesInfo,
2117 volume_info.UNC,
2118 tcon, cifs_sb->local_nls);
2119 cFYI(1, ("CIFS Tcon rc = %d", rc));
2120 }
2121 if (!rc) {
2122 atomic_inc(&pSesInfo->inUse);
2123 tcon->retry = volume_info.retry;
2124 tcon->nocase = volume_info.nocase;
2125 }
2126 }
2127 }
2128 }
2129 if (pSesInfo) {
2130 if (pSesInfo->capabilities & CAP_LARGE_FILES) {
2131 sb->s_maxbytes = (u64) 1 << 63;
2132 } else
2133 sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
2134 }
2135
2136 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
2137 sb->s_time_gran = 100;
2138
2139 /* on error free sesinfo and tcon struct if needed */
2140 if (rc) {
2141 /* if session setup failed, use count is zero but
2142 we still need to free cifsd thread */
2143 if (atomic_read(&srvTcp->socketUseCount) == 0) {
2144 spin_lock(&GlobalMid_Lock);
2145 srvTcp->tcpStatus = CifsExiting;
2146 spin_unlock(&GlobalMid_Lock);
2147 if (srvTcp->tsk) {
2148 struct task_struct *tsk;
2149 /* If we could verify that kthread_stop would
2150 always wake up processes blocked in
2151 tcp in recv_mesg then we could remove the
2152 send_sig call */
2153 force_sig(SIGKILL, srvTcp->tsk);
2154 tsk = srvTcp->tsk;
2155 if (tsk)
2156 kthread_stop(tsk);
2157 }
2158 }
2159 /* If find_unc succeeded then rc == 0 so we can not end */
2160 if (tcon) /* up accidently freeing someone elses tcon struct */
2161 tconInfoFree(tcon);
2162 if (existingCifsSes == NULL) {
2163 if (pSesInfo) {
2164 if ((pSesInfo->server) &&
2165 (pSesInfo->status == CifsGood)) {
2166 int temp_rc;
2167 temp_rc = CIFSSMBLogoff(xid, pSesInfo);
2168 /* if the socketUseCount is now zero */
2169 if ((temp_rc == -ESHUTDOWN) &&
2170 (pSesInfo->server) &&
2171 (pSesInfo->server->tsk)) {
2172 struct task_struct *tsk;
2173 force_sig(SIGKILL,
2174 pSesInfo->server->tsk);
2175 tsk = pSesInfo->server->tsk;
2176 if (tsk)
2177 kthread_stop(tsk);
2178 }
2179 } else {
2180 cFYI(1, ("No session or bad tcon"));
2181 if ((pSesInfo->server) &&
2182 (pSesInfo->server->tsk)) {
2183 struct task_struct *tsk;
2184 force_sig(SIGKILL,
2185 pSesInfo->server->tsk);
2186 tsk = pSesInfo->server->tsk;
2187 if (tsk)
2188 kthread_stop(tsk);
2189 }
2190 }
2191 sesInfoFree(pSesInfo);
2192 /* pSesInfo = NULL; */
2193 }
2194 }
2195 } else {
2196 atomic_inc(&tcon->useCount);
2197 cifs_sb->tcon = tcon;
2198 tcon->ses = pSesInfo;
2199
2200 /* do not care if following two calls succeed - informational */
2201 if (!tcon->ipc) {
2202 CIFSSMBQFSDeviceInfo(xid, tcon);
2203 CIFSSMBQFSAttributeInfo(xid, tcon);
2204 }
2205
2206 /* tell server which Unix caps we support */
2207 if (tcon->ses->capabilities & CAP_UNIX)
2208 /* reset of caps checks mount to see if unix extensions
2209 disabled for just this mount */
2210 reset_cifs_unix_caps(xid, tcon, sb, &volume_info);
2211 else
2212 tcon->unix_ext = 0; /* server does not support them */
2213
2214 if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
2215 cifs_sb->rsize = 1024 * 127;
2216 #ifdef CONFIG_CIFS_DEBUG2
2217 cFYI(1, ("no very large read support, rsize now 127K"));
2218 #endif
2219 }
2220 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2221 cifs_sb->wsize = min(cifs_sb->wsize,
2222 (tcon->ses->server->maxBuf -
2223 MAX_CIFS_HDR_SIZE));
2224 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2225 cifs_sb->rsize = min(cifs_sb->rsize,
2226 (tcon->ses->server->maxBuf -
2227 MAX_CIFS_HDR_SIZE));
2228 }
2229
2230 /* volume_info.password is freed above when existing session found
2231 (in which case it is not needed anymore) but when new sesion is created
2232 the password ptr is put in the new session structure (in which case the
2233 password will be freed at unmount time) */
2234 kfree(volume_info.UNC);
2235 kfree(volume_info.prepath);
2236 FreeXid(xid);
2237 return rc;
2238 }
2239
2240 static int
2241 CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2242 char session_key[CIFS_SESS_KEY_SIZE],
2243 const struct nls_table *nls_codepage)
2244 {
2245 struct smb_hdr *smb_buffer;
2246 struct smb_hdr *smb_buffer_response;
2247 SESSION_SETUP_ANDX *pSMB;
2248 SESSION_SETUP_ANDX *pSMBr;
2249 char *bcc_ptr;
2250 char *user;
2251 char *domain;
2252 int rc = 0;
2253 int remaining_words = 0;
2254 int bytes_returned = 0;
2255 int len;
2256 __u32 capabilities;
2257 __u16 count;
2258
2259 cFYI(1, ("In sesssetup"));
2260 if (ses == NULL)
2261 return -EINVAL;
2262 user = ses->userName;
2263 domain = ses->domainName;
2264 smb_buffer = cifs_buf_get();
2265 if (smb_buffer == NULL) {
2266 return -ENOMEM;
2267 }
2268 smb_buffer_response = smb_buffer;
2269 pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2270
2271 /* send SMBsessionSetup here */
2272 header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2273 NULL /* no tCon exists yet */ , 13 /* wct */ );
2274
2275 smb_buffer->Mid = GetNextMid(ses->server);
2276 pSMB->req_no_secext.AndXCommand = 0xFF;
2277 pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2278 pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2279
2280 if (ses->server->secMode &
2281 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2282 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2283
2284 capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2285 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2286 if (ses->capabilities & CAP_UNICODE) {
2287 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2288 capabilities |= CAP_UNICODE;
2289 }
2290 if (ses->capabilities & CAP_STATUS32) {
2291 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2292 capabilities |= CAP_STATUS32;
2293 }
2294 if (ses->capabilities & CAP_DFS) {
2295 smb_buffer->Flags2 |= SMBFLG2_DFS;
2296 capabilities |= CAP_DFS;
2297 }
2298 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2299
2300 pSMB->req_no_secext.CaseInsensitivePasswordLength =
2301 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2302
2303 pSMB->req_no_secext.CaseSensitivePasswordLength =
2304 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2305 bcc_ptr = pByteArea(smb_buffer);
2306 memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2307 bcc_ptr += CIFS_SESS_KEY_SIZE;
2308 memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2309 bcc_ptr += CIFS_SESS_KEY_SIZE;
2310
2311 if (ses->capabilities & CAP_UNICODE) {
2312 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2313 *bcc_ptr = 0;
2314 bcc_ptr++;
2315 }
2316 if (user == NULL)
2317 bytes_returned = 0; /* skip null user */
2318 else
2319 bytes_returned =
2320 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
2321 nls_codepage);
2322 /* convert number of 16 bit words to bytes */
2323 bcc_ptr += 2 * bytes_returned;
2324 bcc_ptr += 2; /* trailing null */
2325 if (domain == NULL)
2326 bytes_returned =
2327 cifs_strtoUCS((__le16 *) bcc_ptr,
2328 "CIFS_LINUX_DOM", 32, nls_codepage);
2329 else
2330 bytes_returned =
2331 cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2332 nls_codepage);
2333 bcc_ptr += 2 * bytes_returned;
2334 bcc_ptr += 2;
2335 bytes_returned =
2336 cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2337 32, nls_codepage);
2338 bcc_ptr += 2 * bytes_returned;
2339 bytes_returned =
2340 cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release,
2341 32, nls_codepage);
2342 bcc_ptr += 2 * bytes_returned;
2343 bcc_ptr += 2;
2344 bytes_returned =
2345 cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2346 64, nls_codepage);
2347 bcc_ptr += 2 * bytes_returned;
2348 bcc_ptr += 2;
2349 } else {
2350 if (user != NULL) {
2351 strncpy(bcc_ptr, user, 200);
2352 bcc_ptr += strnlen(user, 200);
2353 }
2354 *bcc_ptr = 0;
2355 bcc_ptr++;
2356 if (domain == NULL) {
2357 strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2358 bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2359 } else {
2360 strncpy(bcc_ptr, domain, 64);
2361 bcc_ptr += strnlen(domain, 64);
2362 *bcc_ptr = 0;
2363 bcc_ptr++;
2364 }
2365 strcpy(bcc_ptr, "Linux version ");
2366 bcc_ptr += strlen("Linux version ");
2367 strcpy(bcc_ptr, utsname()->release);
2368 bcc_ptr += strlen(utsname()->release) + 1;
2369 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2370 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2371 }
2372 count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2373 smb_buffer->smb_buf_length += count;
2374 pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2375
2376 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2377 &bytes_returned, 1);
2378 if (rc) {
2379 /* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2380 } else if ((smb_buffer_response->WordCount == 3)
2381 || (smb_buffer_response->WordCount == 4)) {
2382 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2383 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2384 if (action & GUEST_LOGIN)
2385 cFYI(1, (" Guest login")); /* BB mark SesInfo struct? */
2386 ses->Suid = smb_buffer_response->Uid; /* UID left in wire format
2387 (little endian) */
2388 cFYI(1, ("UID = %d ", ses->Suid));
2389 /* response can have either 3 or 4 word count - Samba sends 3 */
2390 bcc_ptr = pByteArea(smb_buffer_response);
2391 if ((pSMBr->resp.hdr.WordCount == 3)
2392 || ((pSMBr->resp.hdr.WordCount == 4)
2393 && (blob_len < pSMBr->resp.ByteCount))) {
2394 if (pSMBr->resp.hdr.WordCount == 4)
2395 bcc_ptr += blob_len;
2396
2397 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2398 if ((long) (bcc_ptr) % 2) {
2399 remaining_words =
2400 (BCC(smb_buffer_response) - 1) / 2;
2401 /* Unicode strings must be word
2402 aligned */
2403 bcc_ptr++;
2404 } else {
2405 remaining_words =
2406 BCC(smb_buffer_response) / 2;
2407 }
2408 len =
2409 UniStrnlen((wchar_t *) bcc_ptr,
2410 remaining_words - 1);
2411 /* We look for obvious messed up bcc or strings in response so we do not go off
2412 the end since (at least) WIN2K and Windows XP have a major bug in not null
2413 terminating last Unicode string in response */
2414 if (ses->serverOS)
2415 kfree(ses->serverOS);
2416 ses->serverOS = kzalloc(2 * (len + 1),
2417 GFP_KERNEL);
2418 if (ses->serverOS == NULL)
2419 goto sesssetup_nomem;
2420 cifs_strfromUCS_le(ses->serverOS,
2421 (__le16 *)bcc_ptr,
2422 len, nls_codepage);
2423 bcc_ptr += 2 * (len + 1);
2424 remaining_words -= len + 1;
2425 ses->serverOS[2 * len] = 0;
2426 ses->serverOS[1 + (2 * len)] = 0;
2427 if (remaining_words > 0) {
2428 len = UniStrnlen((wchar_t *)bcc_ptr,
2429 remaining_words-1);
2430 kfree(ses->serverNOS);
2431 ses->serverNOS = kzalloc(2 * (len + 1),
2432 GFP_KERNEL);
2433 if (ses->serverNOS == NULL)
2434 goto sesssetup_nomem;
2435 cifs_strfromUCS_le(ses->serverNOS,
2436 (__le16 *)bcc_ptr,
2437 len, nls_codepage);
2438 bcc_ptr += 2 * (len + 1);
2439 ses->serverNOS[2 * len] = 0;
2440 ses->serverNOS[1 + (2 * len)] = 0;
2441 if (strncmp(ses->serverNOS,
2442 "NT LAN Manager 4", 16) == 0) {
2443 cFYI(1, ("NT4 server"));
2444 ses->flags |= CIFS_SES_NT4;
2445 }
2446 remaining_words -= len + 1;
2447 if (remaining_words > 0) {
2448 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2449 /* last string is not always null terminated
2450 (for e.g. for Windows XP & 2000) */
2451 if (ses->serverDomain)
2452 kfree(ses->serverDomain);
2453 ses->serverDomain =
2454 kzalloc(2*(len+1),
2455 GFP_KERNEL);
2456 if (ses->serverDomain == NULL)
2457 goto sesssetup_nomem;
2458 cifs_strfromUCS_le(ses->serverDomain,
2459 (__le16 *)bcc_ptr,
2460 len, nls_codepage);
2461 bcc_ptr += 2 * (len + 1);
2462 ses->serverDomain[2*len] = 0;
2463 ses->serverDomain[1+(2*len)] = 0;
2464 } else { /* else no more room so create
2465 dummy domain string */
2466 if (ses->serverDomain)
2467 kfree(ses->serverDomain);
2468 ses->serverDomain =
2469 kzalloc(2, GFP_KERNEL);
2470 }
2471 } else { /* no room so create dummy domain
2472 and NOS string */
2473
2474 /* if these kcallocs fail not much we
2475 can do, but better to not fail the
2476 sesssetup itself */
2477 kfree(ses->serverDomain);
2478 ses->serverDomain =
2479 kzalloc(2, GFP_KERNEL);
2480 kfree(ses->serverNOS);
2481 ses->serverNOS =
2482 kzalloc(2, GFP_KERNEL);
2483 }
2484 } else { /* ASCII */
2485 len = strnlen(bcc_ptr, 1024);
2486 if (((long) bcc_ptr + len) - (long)
2487 pByteArea(smb_buffer_response)
2488 <= BCC(smb_buffer_response)) {
2489 kfree(ses->serverOS);
2490 ses->serverOS = kzalloc(len + 1,
2491 GFP_KERNEL);
2492 if (ses->serverOS == NULL)
2493 goto sesssetup_nomem;
2494 strncpy(ses->serverOS, bcc_ptr, len);
2495
2496 bcc_ptr += len;
2497 /* null terminate the string */
2498 bcc_ptr[0] = 0;
2499 bcc_ptr++;
2500
2501 len = strnlen(bcc_ptr, 1024);
2502 kfree(ses->serverNOS);
2503 ses->serverNOS = kzalloc(len + 1,
2504 GFP_KERNEL);
2505 if (ses->serverNOS == NULL)
2506 goto sesssetup_nomem;
2507 strncpy(ses->serverNOS, bcc_ptr, len);
2508 bcc_ptr += len;
2509 bcc_ptr[0] = 0;
2510 bcc_ptr++;
2511
2512 len = strnlen(bcc_ptr, 1024);
2513 if (ses->serverDomain)
2514 kfree(ses->serverDomain);
2515 ses->serverDomain = kzalloc(len + 1,
2516 GFP_KERNEL);
2517 if (ses->serverDomain == NULL)
2518 goto sesssetup_nomem;
2519 strncpy(ses->serverDomain, bcc_ptr,
2520 len);
2521 bcc_ptr += len;
2522 bcc_ptr[0] = 0;
2523 bcc_ptr++;
2524 } else
2525 cFYI(1,
2526 ("Variable field of length %d "
2527 "extends beyond end of smb ",
2528 len));
2529 }
2530 } else {
2531 cERROR(1,
2532 (" Security Blob Length extends beyond "
2533 "end of SMB"));
2534 }
2535 } else {
2536 cERROR(1,
2537 (" Invalid Word count %d: ",
2538 smb_buffer_response->WordCount));
2539 rc = -EIO;
2540 }
2541 sesssetup_nomem: /* do not return an error on nomem for the info strings,
2542 since that could make reconnection harder, and
2543 reconnection might be needed to free memory */
2544 cifs_buf_release(smb_buffer);
2545
2546 return rc;
2547 }
2548
2549 static int
2550 CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
2551 struct cifsSesInfo *ses, int *pNTLMv2_flag,
2552 const struct nls_table *nls_codepage)
2553 {
2554 struct smb_hdr *smb_buffer;
2555 struct smb_hdr *smb_buffer_response;
2556 SESSION_SETUP_ANDX *pSMB;
2557 SESSION_SETUP_ANDX *pSMBr;
2558 char *bcc_ptr;
2559 char *domain;
2560 int rc = 0;
2561 int remaining_words = 0;
2562 int bytes_returned = 0;
2563 int len;
2564 int SecurityBlobLength = sizeof(NEGOTIATE_MESSAGE);
2565 PNEGOTIATE_MESSAGE SecurityBlob;
2566 PCHALLENGE_MESSAGE SecurityBlob2;
2567 __u32 negotiate_flags, capabilities;
2568 __u16 count;
2569
2570 cFYI(1, ("In NTLMSSP sesssetup (negotiate)"));
2571 if (ses == NULL)
2572 return -EINVAL;
2573 domain = ses->domainName;
2574 *pNTLMv2_flag = FALSE;
2575 smb_buffer = cifs_buf_get();
2576 if (smb_buffer == NULL) {
2577 return -ENOMEM;
2578 }
2579 smb_buffer_response = smb_buffer;
2580 pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2581 pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2582
2583 /* send SMBsessionSetup here */
2584 header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2585 NULL /* no tCon exists yet */ , 12 /* wct */ );
2586
2587 smb_buffer->Mid = GetNextMid(ses->server);
2588 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2589 pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2590
2591 pSMB->req.AndXCommand = 0xFF;
2592 pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2593 pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2594
2595 if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2596 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2597
2598 capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2599 CAP_EXTENDED_SECURITY;
2600 if (ses->capabilities & CAP_UNICODE) {
2601 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2602 capabilities |= CAP_UNICODE;
2603 }
2604 if (ses->capabilities & CAP_STATUS32) {
2605 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2606 capabilities |= CAP_STATUS32;
2607 }
2608 if (ses->capabilities & CAP_DFS) {
2609 smb_buffer->Flags2 |= SMBFLG2_DFS;
2610 capabilities |= CAP_DFS;
2611 }
2612 pSMB->req.Capabilities = cpu_to_le32(capabilities);
2613
2614 bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2615 SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
2616 strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2617 SecurityBlob->MessageType = NtLmNegotiate;
2618 negotiate_flags =
2619 NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
2620 NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM |
2621 NTLMSSP_NEGOTIATE_56 |
2622 /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
2623 if (sign_CIFS_PDUs)
2624 negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
2625 /* if (ntlmv2_support)
2626 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;*/
2627 /* setup pointers to domain name and workstation name */
2628 bcc_ptr += SecurityBlobLength;
2629
2630 SecurityBlob->WorkstationName.Buffer = 0;
2631 SecurityBlob->WorkstationName.Length = 0;
2632 SecurityBlob->WorkstationName.MaximumLength = 0;
2633
2634 /* Domain not sent on first Sesssetup in NTLMSSP, instead it is sent
2635 along with username on auth request (ie the response to challenge) */
2636 SecurityBlob->DomainName.Buffer = 0;
2637 SecurityBlob->DomainName.Length = 0;
2638 SecurityBlob->DomainName.MaximumLength = 0;
2639 if (ses->capabilities & CAP_UNICODE) {
2640 if ((long) bcc_ptr % 2) {
2641 *bcc_ptr = 0;
2642 bcc_ptr++;
2643 }
2644
2645 bytes_returned =
2646 cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2647 32, nls_codepage);
2648 bcc_ptr += 2 * bytes_returned;
2649 bytes_returned =
2650 cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
2651 nls_codepage);
2652 bcc_ptr += 2 * bytes_returned;
2653 bcc_ptr += 2; /* null terminate Linux version */
2654 bytes_returned =
2655 cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2656 64, nls_codepage);
2657 bcc_ptr += 2 * bytes_returned;
2658 *(bcc_ptr + 1) = 0;
2659 *(bcc_ptr + 2) = 0;
2660 bcc_ptr += 2; /* null terminate network opsys string */
2661 *(bcc_ptr + 1) = 0;
2662 *(bcc_ptr + 2) = 0;
2663 bcc_ptr += 2; /* null domain */
2664 } else { /* ASCII */
2665 strcpy(bcc_ptr, "Linux version ");
2666 bcc_ptr += strlen("Linux version ");
2667 strcpy(bcc_ptr, utsname()->release);
2668 bcc_ptr += strlen(utsname()->release) + 1;
2669 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2670 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2671 bcc_ptr++; /* empty domain field */
2672 *bcc_ptr = 0;
2673 }
2674 SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
2675 pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2676 count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2677 smb_buffer->smb_buf_length += count;
2678 pSMB->req.ByteCount = cpu_to_le16(count);
2679
2680 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2681 &bytes_returned, 1);
2682
2683 if (smb_buffer_response->Status.CifsError ==
2684 cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
2685 rc = 0;
2686
2687 if (rc) {
2688 /* rc = map_smb_to_linux_error(smb_buffer_response); *//* done in SendReceive now */
2689 } else if ((smb_buffer_response->WordCount == 3)
2690 || (smb_buffer_response->WordCount == 4)) {
2691 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2692 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2693
2694 if (action & GUEST_LOGIN)
2695 cFYI(1, (" Guest login"));
2696 /* Do we want to set anything in SesInfo struct when guest login? */
2697
2698 bcc_ptr = pByteArea(smb_buffer_response);
2699 /* response can have either 3 or 4 word count - Samba sends 3 */
2700
2701 SecurityBlob2 = (PCHALLENGE_MESSAGE) bcc_ptr;
2702 if (SecurityBlob2->MessageType != NtLmChallenge) {
2703 cFYI(1,
2704 ("Unexpected NTLMSSP message type received %d",
2705 SecurityBlob2->MessageType));
2706 } else if (ses) {
2707 ses->Suid = smb_buffer_response->Uid; /* UID left in le format */
2708 cFYI(1, ("UID = %d", ses->Suid));
2709 if ((pSMBr->resp.hdr.WordCount == 3)
2710 || ((pSMBr->resp.hdr.WordCount == 4)
2711 && (blob_len <
2712 pSMBr->resp.ByteCount))) {
2713
2714 if (pSMBr->resp.hdr.WordCount == 4) {
2715 bcc_ptr += blob_len;
2716 cFYI(1, ("Security Blob Length %d",
2717 blob_len));
2718 }
2719
2720 cFYI(1, ("NTLMSSP Challenge rcvd"));
2721
2722 memcpy(ses->server->cryptKey,
2723 SecurityBlob2->Challenge,
2724 CIFS_CRYPTO_KEY_SIZE);
2725 if (SecurityBlob2->NegotiateFlags &
2726 cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
2727 *pNTLMv2_flag = TRUE;
2728
2729 if ((SecurityBlob2->NegotiateFlags &
2730 cpu_to_le32(NTLMSSP_NEGOTIATE_ALWAYS_SIGN))
2731 || (sign_CIFS_PDUs > 1))
2732 ses->server->secMode |=
2733 SECMODE_SIGN_REQUIRED;
2734 if ((SecurityBlob2->NegotiateFlags &
2735 cpu_to_le32(NTLMSSP_NEGOTIATE_SIGN)) && (sign_CIFS_PDUs))
2736 ses->server->secMode |=
2737 SECMODE_SIGN_ENABLED;
2738
2739 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2740 if ((long) (bcc_ptr) % 2) {
2741 remaining_words =
2742 (BCC(smb_buffer_response)
2743 - 1) / 2;
2744 /* Must word align unicode strings */
2745 bcc_ptr++;
2746 } else {
2747 remaining_words =
2748 BCC
2749 (smb_buffer_response) / 2;
2750 }
2751 len =
2752 UniStrnlen((wchar_t *) bcc_ptr,
2753 remaining_words - 1);
2754 /* We look for obvious messed up bcc or strings in response so we do not go off
2755 the end since (at least) WIN2K and Windows XP have a major bug in not null
2756 terminating last Unicode string in response */
2757 if (ses->serverOS)
2758 kfree(ses->serverOS);
2759 ses->serverOS =
2760 kzalloc(2 * (len + 1), GFP_KERNEL);
2761 cifs_strfromUCS_le(ses->serverOS,
2762 (__le16 *)
2763 bcc_ptr, len,
2764 nls_codepage);
2765 bcc_ptr += 2 * (len + 1);
2766 remaining_words -= len + 1;
2767 ses->serverOS[2 * len] = 0;
2768 ses->serverOS[1 + (2 * len)] = 0;
2769 if (remaining_words > 0) {
2770 len = UniStrnlen((wchar_t *)
2771 bcc_ptr,
2772 remaining_words
2773 - 1);
2774 kfree(ses->serverNOS);
2775 ses->serverNOS =
2776 kzalloc(2 * (len + 1),
2777 GFP_KERNEL);
2778 cifs_strfromUCS_le(ses->
2779 serverNOS,
2780 (__le16 *)
2781 bcc_ptr,
2782 len,
2783 nls_codepage);
2784 bcc_ptr += 2 * (len + 1);
2785 ses->serverNOS[2 * len] = 0;
2786 ses->serverNOS[1 +
2787 (2 * len)] = 0;
2788 remaining_words -= len + 1;
2789 if (remaining_words > 0) {
2790 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2791 /* last string not always null terminated
2792 (for e.g. for Windows XP & 2000) */
2793 kfree(ses->serverDomain);
2794 ses->serverDomain =
2795 kzalloc(2 *
2796 (len +
2797 1),
2798 GFP_KERNEL);
2799 cifs_strfromUCS_le
2800 (ses->serverDomain,
2801 (__le16 *)bcc_ptr,
2802 len, nls_codepage);
2803 bcc_ptr +=
2804 2 * (len + 1);
2805 ses->serverDomain[2*len]
2806 = 0;
2807 ses->serverDomain
2808 [1 + (2 * len)]
2809 = 0;
2810 } /* else no more room so create dummy domain string */
2811 else {
2812 kfree(ses->serverDomain);
2813 ses->serverDomain =
2814 kzalloc(2,
2815 GFP_KERNEL);
2816 }
2817 } else { /* no room so create dummy domain and NOS string */
2818 kfree(ses->serverDomain);
2819 ses->serverDomain =
2820 kzalloc(2, GFP_KERNEL);
2821 kfree(ses->serverNOS);
2822 ses->serverNOS =
2823 kzalloc(2, GFP_KERNEL);
2824 }
2825 } else { /* ASCII */
2826 len = strnlen(bcc_ptr, 1024);
2827 if (((long) bcc_ptr + len) - (long)
2828 pByteArea(smb_buffer_response)
2829 <= BCC(smb_buffer_response)) {
2830 if (ses->serverOS)
2831 kfree(ses->serverOS);
2832 ses->serverOS =
2833 kzalloc(len + 1,
2834 GFP_KERNEL);
2835 strncpy(ses->serverOS,
2836 bcc_ptr, len);
2837
2838 bcc_ptr += len;
2839 bcc_ptr[0] = 0; /* null terminate string */
2840 bcc_ptr++;
2841
2842 len = strnlen(bcc_ptr, 1024);
2843 kfree(ses->serverNOS);
2844 ses->serverNOS =
2845 kzalloc(len + 1,
2846 GFP_KERNEL);
2847 strncpy(ses->serverNOS, bcc_ptr, len);
2848 bcc_ptr += len;
2849 bcc_ptr[0] = 0;
2850 bcc_ptr++;
2851
2852 len = strnlen(bcc_ptr, 1024);
2853 kfree(ses->serverDomain);
2854 ses->serverDomain =
2855 kzalloc(len + 1,
2856 GFP_KERNEL);
2857 strncpy(ses->serverDomain,
2858 bcc_ptr, len);
2859 bcc_ptr += len;
2860 bcc_ptr[0] = 0;
2861 bcc_ptr++;
2862 } else
2863 cFYI(1,
2864 ("field of length %d "
2865 "extends beyond end of smb",
2866 len));
2867 }
2868 } else {
2869 cERROR(1, ("Security Blob Length extends beyond"
2870 " end of SMB"));
2871 }
2872 } else {
2873 cERROR(1, ("No session structure passed in."));
2874 }
2875 } else {
2876 cERROR(1,
2877 (" Invalid Word count %d:",
2878 smb_buffer_response->WordCount));
2879 rc = -EIO;
2880 }
2881
2882 cifs_buf_release(smb_buffer);
2883
2884 return rc;
2885 }
2886 static int
2887 CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2888 char *ntlm_session_key, int ntlmv2_flag,
2889 const struct nls_table *nls_codepage)
2890 {
2891 struct smb_hdr *smb_buffer;
2892 struct smb_hdr *smb_buffer_response;
2893 SESSION_SETUP_ANDX *pSMB;
2894 SESSION_SETUP_ANDX *pSMBr;
2895 char *bcc_ptr;
2896 char *user;
2897 char *domain;
2898 int rc = 0;
2899 int remaining_words = 0;
2900 int bytes_returned = 0;
2901 int len;
2902 int SecurityBlobLength = sizeof(AUTHENTICATE_MESSAGE);
2903 PAUTHENTICATE_MESSAGE SecurityBlob;
2904 __u32 negotiate_flags, capabilities;
2905 __u16 count;
2906
2907 cFYI(1, ("In NTLMSSPSessSetup (Authenticate)"));
2908 if (ses == NULL)
2909 return -EINVAL;
2910 user = ses->userName;
2911 domain = ses->domainName;
2912 smb_buffer = cifs_buf_get();
2913 if (smb_buffer == NULL) {
2914 return -ENOMEM;
2915 }
2916 smb_buffer_response = smb_buffer;
2917 pSMB = (SESSION_SETUP_ANDX *)smb_buffer;
2918 pSMBr = (SESSION_SETUP_ANDX *)smb_buffer_response;
2919
2920 /* send SMBsessionSetup here */
2921 header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2922 NULL /* no tCon exists yet */ , 12 /* wct */ );
2923
2924 smb_buffer->Mid = GetNextMid(ses->server);
2925 pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2926 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2927 pSMB->req.AndXCommand = 0xFF;
2928 pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2929 pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2930
2931 pSMB->req.hdr.Uid = ses->Suid;
2932
2933 if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2934 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2935
2936 capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2937 CAP_EXTENDED_SECURITY;
2938 if (ses->capabilities & CAP_UNICODE) {
2939 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2940 capabilities |= CAP_UNICODE;
2941 }
2942 if (ses->capabilities & CAP_STATUS32) {
2943 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2944 capabilities |= CAP_STATUS32;
2945 }
2946 if (ses->capabilities & CAP_DFS) {
2947 smb_buffer->Flags2 |= SMBFLG2_DFS;
2948 capabilities |= CAP_DFS;
2949 }
2950 pSMB->req.Capabilities = cpu_to_le32(capabilities);
2951
2952 bcc_ptr = (char *)&pSMB->req.SecurityBlob;
2953 SecurityBlob = (PAUTHENTICATE_MESSAGE)bcc_ptr;
2954 strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2955 SecurityBlob->MessageType = NtLmAuthenticate;
2956 bcc_ptr += SecurityBlobLength;
2957 negotiate_flags = NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_REQUEST_TARGET |
2958 NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_TARGET_INFO |
2959 0x80000000 | NTLMSSP_NEGOTIATE_128;
2960 if (sign_CIFS_PDUs)
2961 negotiate_flags |= /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN |*/ NTLMSSP_NEGOTIATE_SIGN;
2962 if (ntlmv2_flag)
2963 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
2964
2965 /* setup pointers to domain name and workstation name */
2966
2967 SecurityBlob->WorkstationName.Buffer = 0;
2968 SecurityBlob->WorkstationName.Length = 0;
2969 SecurityBlob->WorkstationName.MaximumLength = 0;
2970 SecurityBlob->SessionKey.Length = 0;
2971 SecurityBlob->SessionKey.MaximumLength = 0;
2972 SecurityBlob->SessionKey.Buffer = 0;
2973
2974 SecurityBlob->LmChallengeResponse.Length = 0;
2975 SecurityBlob->LmChallengeResponse.MaximumLength = 0;
2976 SecurityBlob->LmChallengeResponse.Buffer = 0;
2977
2978 SecurityBlob->NtChallengeResponse.Length =
2979 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2980 SecurityBlob->NtChallengeResponse.MaximumLength =
2981 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2982 memcpy(bcc_ptr, ntlm_session_key, CIFS_SESS_KEY_SIZE);
2983 SecurityBlob->NtChallengeResponse.Buffer =
2984 cpu_to_le32(SecurityBlobLength);
2985 SecurityBlobLength += CIFS_SESS_KEY_SIZE;
2986 bcc_ptr += CIFS_SESS_KEY_SIZE;
2987
2988 if (ses->capabilities & CAP_UNICODE) {
2989 if (domain == NULL) {
2990 SecurityBlob->DomainName.Buffer = 0;
2991 SecurityBlob->DomainName.Length = 0;
2992 SecurityBlob->DomainName.MaximumLength = 0;
2993 } else {
2994 __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2995 nls_codepage);
2996 ln *= 2;
2997 SecurityBlob->DomainName.MaximumLength =
2998 cpu_to_le16(ln);
2999 SecurityBlob->DomainName.Buffer =
3000 cpu_to_le32(SecurityBlobLength);
3001 bcc_ptr += ln;
3002 SecurityBlobLength += ln;
3003 SecurityBlob->DomainName.Length = cpu_to_le16(ln);
3004 }
3005 if (user == NULL) {
3006 SecurityBlob->UserName.Buffer = 0;
3007 SecurityBlob->UserName.Length = 0;
3008 SecurityBlob->UserName.MaximumLength = 0;
3009 } else {
3010 __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, user, 64,
3011 nls_codepage);
3012 ln *= 2;
3013 SecurityBlob->UserName.MaximumLength =
3014 cpu_to_le16(ln);
3015 SecurityBlob->UserName.Buffer =
3016 cpu_to_le32(SecurityBlobLength);
3017 bcc_ptr += ln;
3018 SecurityBlobLength += ln;
3019 SecurityBlob->UserName.Length = cpu_to_le16(ln);
3020 }
3021
3022 /* SecurityBlob->WorkstationName.Length =
3023 cifs_strtoUCS((__le16 *) bcc_ptr, "AMACHINE",64, nls_codepage);
3024 SecurityBlob->WorkstationName.Length *= 2;
3025 SecurityBlob->WorkstationName.MaximumLength =
3026 cpu_to_le16(SecurityBlob->WorkstationName.Length);
3027 SecurityBlob->WorkstationName.Buffer =
3028 cpu_to_le32(SecurityBlobLength);
3029 bcc_ptr += SecurityBlob->WorkstationName.Length;
3030 SecurityBlobLength += SecurityBlob->WorkstationName.Length;
3031 SecurityBlob->WorkstationName.Length =
3032 cpu_to_le16(SecurityBlob->WorkstationName.Length); */
3033
3034 if ((long) bcc_ptr % 2) {
3035 *bcc_ptr = 0;
3036 bcc_ptr++;
3037 }
3038 bytes_returned =
3039 cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
3040 32, nls_codepage);
3041 bcc_ptr += 2 * bytes_returned;
3042 bytes_returned =
3043 cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
3044 nls_codepage);
3045 bcc_ptr += 2 * bytes_returned;
3046 bcc_ptr += 2; /* null term version string */
3047 bytes_returned =
3048 cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
3049 64, nls_codepage);
3050 bcc_ptr += 2 * bytes_returned;
3051 *(bcc_ptr + 1) = 0;
3052 *(bcc_ptr + 2) = 0;
3053 bcc_ptr += 2; /* null terminate network opsys string */
3054 *(bcc_ptr + 1) = 0;
3055 *(bcc_ptr + 2) = 0;
3056 bcc_ptr += 2; /* null domain */
3057 } else { /* ASCII */
3058 if (domain == NULL) {
3059 SecurityBlob->DomainName.Buffer = 0;
3060 SecurityBlob->DomainName.Length = 0;
3061 SecurityBlob->DomainName.MaximumLength = 0;
3062 } else {
3063 __u16 ln;
3064 negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
3065 strncpy(bcc_ptr, domain, 63);
3066 ln = strnlen(domain, 64);
3067 SecurityBlob->DomainName.MaximumLength =
3068 cpu_to_le16(ln);
3069 SecurityBlob->DomainName.Buffer =
3070 cpu_to_le32(SecurityBlobLength);
3071 bcc_ptr += ln;
3072 SecurityBlobLength += ln;
3073 SecurityBlob->DomainName.Length = cpu_to_le16(ln);
3074 }
3075 if (user == NULL) {
3076 SecurityBlob->UserName.Buffer = 0;
3077 SecurityBlob->UserName.Length = 0;
3078 SecurityBlob->UserName.MaximumLength = 0;
3079 } else {
3080 __u16 ln;
3081 strncpy(bcc_ptr, user, 63);
3082 ln = strnlen(user, 64);
3083 SecurityBlob->UserName.MaximumLength = cpu_to_le16(ln);
3084 SecurityBlob->UserName.Buffer =
3085 cpu_to_le32(SecurityBlobLength);
3086 bcc_ptr += ln;
3087 SecurityBlobLength += ln;
3088 SecurityBlob->UserName.Length = cpu_to_le16(ln);
3089 }
3090 /* BB fill in our workstation name if known BB */
3091
3092 strcpy(bcc_ptr, "Linux version ");
3093 bcc_ptr += strlen("Linux version ");
3094 strcpy(bcc_ptr, utsname()->release);
3095 bcc_ptr += strlen(utsname()->release) + 1;
3096 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
3097 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
3098 bcc_ptr++; /* null domain */
3099 *bcc_ptr = 0;
3100 }
3101 SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
3102 pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
3103 count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
3104 smb_buffer->smb_buf_length += count;
3105 pSMB->req.ByteCount = cpu_to_le16(count);
3106
3107 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
3108 &bytes_returned, 1);
3109 if (rc) {
3110 /* rc = map_smb_to_linux_error(smb_buffer_response) done in SendReceive now */
3111 } else if ((smb_buffer_response->WordCount == 3) ||
3112 (smb_buffer_response->WordCount == 4)) {
3113 __u16 action = le16_to_cpu(pSMBr->resp.Action);
3114 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
3115 if (action & GUEST_LOGIN)
3116 cFYI(1, (" Guest login")); /* BB Should we set anything
3117 in SesInfo struct ? */
3118 /* if (SecurityBlob2->MessageType != NtLm??) {
3119 cFYI("Unexpected message type on auth response is %d"));
3120 } */
3121
3122 if (ses) {
3123 cFYI(1,
3124 ("Check challenge UID %d vs auth response UID %d",
3125 ses->Suid, smb_buffer_response->Uid));
3126 /* UID left in wire format */
3127 ses->Suid = smb_buffer_response->Uid;
3128 bcc_ptr = pByteArea(smb_buffer_response);
3129 /* response can have either 3 or 4 word count - Samba sends 3 */
3130 if ((pSMBr->resp.hdr.WordCount == 3)
3131 || ((pSMBr->resp.hdr.WordCount == 4)
3132 && (blob_len <
3133 pSMBr->resp.ByteCount))) {
3134 if (pSMBr->resp.hdr.WordCount == 4) {
3135 bcc_ptr +=
3136 blob_len;
3137 cFYI(1,
3138 ("Security Blob Length %d ",
3139 blob_len));
3140 }
3141
3142 cFYI(1,
3143 ("NTLMSSP response to Authenticate "));
3144
3145 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3146 if ((long) (bcc_ptr) % 2) {
3147 remaining_words =
3148 (BCC(smb_buffer_response)
3149 - 1) / 2;
3150 bcc_ptr++; /* Unicode strings must be word aligned */
3151 } else {
3152 remaining_words = BCC(smb_buffer_response) / 2;
3153 }
3154 len = UniStrnlen((wchar_t *) bcc_ptr,
3155 remaining_words - 1);
3156 /* We look for obvious messed up bcc or strings in response so we do not go off
3157 the end since (at least) WIN2K and Windows XP have a major bug in not null
3158 terminating last Unicode string in response */
3159 if (ses->serverOS)
3160 kfree(ses->serverOS);
3161 ses->serverOS =
3162 kzalloc(2 * (len + 1), GFP_KERNEL);
3163 cifs_strfromUCS_le(ses->serverOS,
3164 (__le16 *)
3165 bcc_ptr, len,
3166 nls_codepage);
3167 bcc_ptr += 2 * (len + 1);
3168 remaining_words -= len + 1;
3169 ses->serverOS[2 * len] = 0;
3170 ses->serverOS[1 + (2 * len)] = 0;
3171 if (remaining_words > 0) {
3172 len = UniStrnlen((wchar_t *)
3173 bcc_ptr,
3174 remaining_words
3175 - 1);
3176 kfree(ses->serverNOS);
3177 ses->serverNOS =
3178 kzalloc(2 * (len + 1),
3179 GFP_KERNEL);
3180 cifs_strfromUCS_le(ses->
3181 serverNOS,
3182 (__le16 *)
3183 bcc_ptr,
3184 len,
3185 nls_codepage);
3186 bcc_ptr += 2 * (len + 1);
3187 ses->serverNOS[2 * len] = 0;
3188 ses->serverNOS[1+(2*len)] = 0;
3189 remaining_words -= len + 1;
3190 if (remaining_words > 0) {
3191 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
3192 /* last string not always null terminated (e.g. for Windows XP & 2000) */
3193 if (ses->serverDomain)
3194 kfree(ses->serverDomain);
3195 ses->serverDomain =
3196 kzalloc(2 *
3197 (len +
3198 1),
3199 GFP_KERNEL);
3200 cifs_strfromUCS_le
3201 (ses->
3202 serverDomain,
3203 (__le16 *)
3204 bcc_ptr, len,
3205 nls_codepage);
3206 bcc_ptr +=
3207 2 * (len + 1);
3208 ses->
3209 serverDomain[2
3210 * len]
3211 = 0;
3212 ses->
3213 serverDomain[1
3214 +
3215 (2
3216 *
3217 len)]
3218 = 0;
3219 } /* else no more room so create dummy domain string */
3220 else {
3221 if (ses->serverDomain)
3222 kfree(ses->serverDomain);
3223 ses->serverDomain = kzalloc(2,GFP_KERNEL);
3224 }
3225 } else { /* no room so create dummy domain and NOS string */
3226 if (ses->serverDomain)
3227 kfree(ses->serverDomain);
3228 ses->serverDomain = kzalloc(2, GFP_KERNEL);
3229 kfree(ses->serverNOS);
3230 ses->serverNOS = kzalloc(2, GFP_KERNEL);
3231 }
3232 } else { /* ASCII */
3233 len = strnlen(bcc_ptr, 1024);
3234 if (((long) bcc_ptr + len) -
3235 (long) pByteArea(smb_buffer_response)
3236 <= BCC(smb_buffer_response)) {
3237 if (ses->serverOS)
3238 kfree(ses->serverOS);
3239 ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
3240 strncpy(ses->serverOS,bcc_ptr, len);
3241
3242 bcc_ptr += len;
3243 bcc_ptr[0] = 0; /* null terminate the string */
3244 bcc_ptr++;
3245
3246 len = strnlen(bcc_ptr, 1024);
3247 kfree(ses->serverNOS);
3248 ses->serverNOS = kzalloc(len+1,
3249 GFP_KERNEL);
3250 strncpy(ses->serverNOS,
3251 bcc_ptr, len);
3252 bcc_ptr += len;
3253 bcc_ptr[0] = 0;
3254 bcc_ptr++;
3255
3256 len = strnlen(bcc_ptr, 1024);
3257 if (ses->serverDomain)
3258 kfree(ses->serverDomain);
3259 ses->serverDomain =
3260 kzalloc(len+1,
3261 GFP_KERNEL);
3262 strncpy(ses->serverDomain,
3263 bcc_ptr, len);
3264 bcc_ptr += len;
3265 bcc_ptr[0] = 0;
3266 bcc_ptr++;
3267 } else
3268 cFYI(1, ("field of length %d "
3269 "extends beyond end of smb ",
3270 len));
3271 }
3272 } else {
3273 cERROR(1, ("Security Blob extends beyond end "
3274 "of SMB"));
3275 }
3276 } else {
3277 cERROR(1, ("No session structure passed in."));
3278 }
3279 } else {
3280 cERROR(1, ("Invalid Word count %d: ",
3281 smb_buffer_response->WordCount));
3282 rc = -EIO;
3283 }
3284
3285 cifs_buf_release(smb_buffer);
3286
3287 return rc;
3288 }
3289
3290 int
3291 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
3292 const char *tree, struct cifsTconInfo *tcon,
3293 const struct nls_table *nls_codepage)
3294 {
3295 struct smb_hdr *smb_buffer;
3296 struct smb_hdr *smb_buffer_response;
3297 TCONX_REQ *pSMB;
3298 TCONX_RSP *pSMBr;
3299 unsigned char *bcc_ptr;
3300 int rc = 0;
3301 int length;
3302 __u16 count;
3303
3304 if (ses == NULL)
3305 return -EIO;
3306
3307 smb_buffer = cifs_buf_get();
3308 if (smb_buffer == NULL) {
3309 return -ENOMEM;
3310 }
3311 smb_buffer_response = smb_buffer;
3312
3313 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3314 NULL /*no tid */ , 4 /*wct */ );
3315
3316 smb_buffer->Mid = GetNextMid(ses->server);
3317 smb_buffer->Uid = ses->Suid;
3318 pSMB = (TCONX_REQ *) smb_buffer;
3319 pSMBr = (TCONX_RSP *) smb_buffer_response;
3320
3321 pSMB->AndXCommand = 0xFF;
3322 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
3323 bcc_ptr = &pSMB->Password[0];
3324 if ((ses->server->secMode) & SECMODE_USER) {
3325 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
3326 *bcc_ptr = 0; /* password is null byte */
3327 bcc_ptr++; /* skip password */
3328 /* already aligned so no need to do it below */
3329 } else {
3330 pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
3331 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3332 specified as required (when that support is added to
3333 the vfs in the future) as only NTLM or the much
3334 weaker LANMAN (which we do not send by default) is accepted
3335 by Samba (not sure whether other servers allow
3336 NTLMv2 password here) */
3337 #ifdef CONFIG_CIFS_WEAK_PW_HASH
3338 if ((extended_security & CIFSSEC_MAY_LANMAN) &&
3339 (ses->server->secType == LANMAN))
3340 calc_lanman_hash(ses, bcc_ptr);
3341 else
3342 #endif /* CIFS_WEAK_PW_HASH */
3343 SMBNTencrypt(ses->password,
3344 ses->server->cryptKey,
3345 bcc_ptr);
3346
3347 bcc_ptr += CIFS_SESS_KEY_SIZE;
3348 if (ses->capabilities & CAP_UNICODE) {
3349 /* must align unicode strings */
3350 *bcc_ptr = 0; /* null byte password */
3351 bcc_ptr++;
3352 }
3353 }
3354
3355 if (ses->server->secMode &
3356 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3357 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3358
3359 if (ses->capabilities & CAP_STATUS32) {
3360 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3361 }
3362 if (ses->capabilities & CAP_DFS) {
3363 smb_buffer->Flags2 |= SMBFLG2_DFS;
3364 }
3365 if (ses->capabilities & CAP_UNICODE) {
3366 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3367 length =
3368 cifs_strtoUCS((__le16 *) bcc_ptr, tree,
3369 6 /* max utf8 char length in bytes */ *
3370 (/* server len*/ + 256 /* share len */), nls_codepage);
3371 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
3372 bcc_ptr += 2; /* skip trailing null */
3373 } else { /* ASCII */
3374 strcpy(bcc_ptr, tree);
3375 bcc_ptr += strlen(tree) + 1;
3376 }
3377 strcpy(bcc_ptr, "?????");
3378 bcc_ptr += strlen("?????");
3379 bcc_ptr += 1;
3380 count = bcc_ptr - &pSMB->Password[0];
3381 pSMB->hdr.smb_buf_length += count;
3382 pSMB->ByteCount = cpu_to_le16(count);
3383
3384 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, 0);
3385
3386 /* if (rc) rc = map_smb_to_linux_error(smb_buffer_response); */
3387 /* above now done in SendReceive */
3388 if ((rc == 0) && (tcon != NULL)) {
3389 tcon->tidStatus = CifsGood;
3390 tcon->tid = smb_buffer_response->Tid;
3391 bcc_ptr = pByteArea(smb_buffer_response);
3392 length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
3393 /* skip service field (NB: this field is always ASCII) */
3394 if (length == 3) {
3395 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3396 (bcc_ptr[2] == 'C')) {
3397 cFYI(1, ("IPC connection"));
3398 tcon->ipc = 1;
3399 }
3400 } else if (length == 2) {
3401 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3402 /* the most common case */
3403 cFYI(1, ("disk share connection"));
3404 }
3405 }
3406 bcc_ptr += length + 1;
3407 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
3408 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3409 length = UniStrnlen((wchar_t *) bcc_ptr, 512);
3410 if ((bcc_ptr + (2 * length)) -
3411 pByteArea(smb_buffer_response) <=
3412 BCC(smb_buffer_response)) {
3413 kfree(tcon->nativeFileSystem);
3414 tcon->nativeFileSystem =
3415 kzalloc(length + 2, GFP_KERNEL);
3416 if (tcon->nativeFileSystem)
3417 cifs_strfromUCS_le(
3418 tcon->nativeFileSystem,
3419 (__le16 *) bcc_ptr,
3420 length, nls_codepage);
3421 bcc_ptr += 2 * length;
3422 bcc_ptr[0] = 0; /* null terminate the string */
3423 bcc_ptr[1] = 0;
3424 bcc_ptr += 2;
3425 }
3426 /* else do not bother copying these information fields*/
3427 } else {
3428 length = strnlen(bcc_ptr, 1024);
3429 if ((bcc_ptr + length) -
3430 pByteArea(smb_buffer_response) <=
3431 BCC(smb_buffer_response)) {
3432 kfree(tcon->nativeFileSystem);
3433 tcon->nativeFileSystem =
3434 kzalloc(length + 1, GFP_KERNEL);
3435 if (tcon->nativeFileSystem)
3436 strncpy(tcon->nativeFileSystem, bcc_ptr,
3437 length);
3438 }
3439 /* else do not bother copying these information fields*/
3440 }
3441 if ((smb_buffer_response->WordCount == 3) ||
3442 (smb_buffer_response->WordCount == 7))
3443 /* field is in same location */
3444 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3445 else
3446 tcon->Flags = 0;
3447 cFYI(1, ("Tcon flags: 0x%x ", tcon->Flags));
3448 } else if ((rc == 0) && tcon == NULL) {
3449 /* all we need to save for IPC$ connection */
3450 ses->ipc_tid = smb_buffer_response->Tid;
3451 }
3452
3453 cifs_buf_release(smb_buffer);
3454 return rc;
3455 }
3456
3457 int
3458 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
3459 {
3460 int rc = 0;
3461 int xid;
3462 struct cifsSesInfo *ses = NULL;
3463 struct task_struct *cifsd_task;
3464 char *tmp;
3465
3466 xid = GetXid();
3467
3468 if (cifs_sb->tcon) {
3469 ses = cifs_sb->tcon->ses; /* save ptr to ses before delete tcon!*/
3470 rc = CIFSSMBTDis(xid, cifs_sb->tcon);
3471 if (rc == -EBUSY) {
3472 FreeXid(xid);
3473 return 0;
3474 }
3475 tconInfoFree(cifs_sb->tcon);
3476 if ((ses) && (ses->server)) {
3477 /* save off task so we do not refer to ses later */
3478 cifsd_task = ses->server->tsk;
3479 cFYI(1, ("About to do SMBLogoff "));
3480 rc = CIFSSMBLogoff(xid, ses);
3481 if (rc == -EBUSY) {
3482 FreeXid(xid);
3483 return 0;
3484 } else if (rc == -ESHUTDOWN) {
3485 cFYI(1, ("Waking up socket by sending signal"));
3486 if (cifsd_task) {
3487 force_sig(SIGKILL, cifsd_task);
3488 kthread_stop(cifsd_task);
3489 }
3490 rc = 0;
3491 } /* else - we have an smb session
3492 left on this socket do not kill cifsd */
3493 } else
3494 cFYI(1, ("No session or bad tcon"));
3495 }
3496
3497 cifs_sb->tcon = NULL;
3498 tmp = cifs_sb->prepath;
3499 cifs_sb->prepathlen = 0;
3500 cifs_sb->prepath = NULL;
3501 kfree(tmp);
3502 if (ses)
3503 schedule_timeout_interruptible(msecs_to_jiffies(500));
3504 if (ses)
3505 sesInfoFree(ses);
3506
3507 FreeXid(xid);
3508 return rc; /* BB check if we should always return zero here */
3509 }
3510
3511 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
3512 struct nls_table *nls_info)
3513 {
3514 int rc = 0;
3515 char ntlm_session_key[CIFS_SESS_KEY_SIZE];
3516 int ntlmv2_flag = FALSE;
3517 int first_time = 0;
3518
3519 /* what if server changes its buffer size after dropping the session? */
3520 if (pSesInfo->server->maxBuf == 0) /* no need to send on reconnect */ {
3521 rc = CIFSSMBNegotiate(xid, pSesInfo);
3522 if (rc == -EAGAIN) /* retry only once on 1st time connection */ {
3523 rc = CIFSSMBNegotiate(xid, pSesInfo);
3524 if (rc == -EAGAIN)
3525 rc = -EHOSTDOWN;
3526 }
3527 if (rc == 0) {
3528 spin_lock(&GlobalMid_Lock);
3529 if (pSesInfo->server->tcpStatus != CifsExiting)
3530 pSesInfo->server->tcpStatus = CifsGood;
3531 else
3532 rc = -EHOSTDOWN;
3533 spin_unlock(&GlobalMid_Lock);
3534
3535 }
3536 first_time = 1;
3537 }
3538 if (!rc) {
3539 pSesInfo->flags = 0;
3540 pSesInfo->capabilities = pSesInfo->server->capabilities;
3541 if (linuxExtEnabled == 0)
3542 pSesInfo->capabilities &= (~CAP_UNIX);
3543 /* pSesInfo->sequence_number = 0;*/
3544 cFYI(1,
3545 ("Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
3546 pSesInfo->server->secMode,
3547 pSesInfo->server->capabilities,
3548 pSesInfo->server->timeAdj));
3549 if (experimEnabled < 2)
3550 rc = CIFS_SessSetup(xid, pSesInfo,
3551 first_time, nls_info);
3552 else if (extended_security
3553 && (pSesInfo->capabilities
3554 & CAP_EXTENDED_SECURITY)
3555 && (pSesInfo->server->secType == NTLMSSP)) {
3556 rc = -EOPNOTSUPP;
3557 } else if (extended_security
3558 && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3559 && (pSesInfo->server->secType == RawNTLMSSP)) {
3560 cFYI(1, ("NTLMSSP sesssetup"));
3561 rc = CIFSNTLMSSPNegotiateSessSetup(xid,
3562 pSesInfo,
3563 &ntlmv2_flag,
3564 nls_info);
3565 if (!rc) {
3566 if (ntlmv2_flag) {
3567 char *v2_response;
3568 cFYI(1, ("more secure NTLM ver2 hash"));
3569 if (CalcNTLMv2_partial_mac_key(pSesInfo,
3570 nls_info)) {
3571 rc = -ENOMEM;
3572 goto ss_err_exit;
3573 } else
3574 v2_response = kmalloc(16 + 64 /* blob */, GFP_KERNEL);
3575 if (v2_response) {
3576 CalcNTLMv2_response(pSesInfo,
3577 v2_response);
3578 /* if (first_time)
3579 cifs_calculate_ntlmv2_mac_key(
3580 pSesInfo->server->mac_signing_key,
3581 response, ntlm_session_key,*/
3582 kfree(v2_response);
3583 /* BB Put dummy sig in SessSetup PDU? */
3584 } else {
3585 rc = -ENOMEM;
3586 goto ss_err_exit;
3587 }
3588
3589 } else {
3590 SMBNTencrypt(pSesInfo->password,
3591 pSesInfo->server->cryptKey,
3592 ntlm_session_key);
3593
3594 if (first_time)
3595 cifs_calculate_mac_key(
3596 &pSesInfo->server->mac_signing_key,
3597 ntlm_session_key,
3598 pSesInfo->password);
3599 }
3600 /* for better security the weaker lanman hash not sent
3601 in AuthSessSetup so we no longer calculate it */
3602
3603 rc = CIFSNTLMSSPAuthSessSetup(xid,
3604 pSesInfo,
3605 ntlm_session_key,
3606 ntlmv2_flag,
3607 nls_info);
3608 }
3609 } else { /* old style NTLM 0.12 session setup */
3610 SMBNTencrypt(pSesInfo->password,
3611 pSesInfo->server->cryptKey,
3612 ntlm_session_key);
3613
3614 if (first_time)
3615 cifs_calculate_mac_key(
3616 &pSesInfo->server->mac_signing_key,
3617 ntlm_session_key, pSesInfo->password);
3618
3619 rc = CIFSSessSetup(xid, pSesInfo,
3620 ntlm_session_key, nls_info);
3621 }
3622 if (rc) {
3623 cERROR(1, ("Send error in SessSetup = %d", rc));
3624 } else {
3625 cFYI(1, ("CIFS Session Established successfully"));
3626 pSesInfo->status = CifsGood;
3627 }
3628 }
3629 ss_err_exit:
3630 return rc;
3631 }
3632
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